usb: kbd: support Apple Magic Keyboards (2021)

usb: kbd: support Apple Magic Keyboards (2021)

Apple USB keyboards (Magic Keyboard from 2021 (product id 0x029c)) carry
the HID keyboard boot protocol on the second interface descriptor.
Probe via vendor and product IDs since the class/subclass/protocol match
uses the first interface descriptor.
Probe the two first interface descriptors for the HID keyboard boot
protocol.

USB configuration descriptor for reference:

| Bus 003 Device 002: ID 05ac:029c Apple, Inc. Magic Keyboard
| Device Descriptor:
|   bLength                18
|   bDescriptorType         1
|   bcdUSB               2.00
|   bDeviceClass            0 [unknown]
|   bDeviceSubClass         0 [unknown]
|   bDeviceProtocol         0
|   bMaxPacketSize0        64
|   idVendor           0x05ac Apple, Inc.
|   idProduct          0x029c Magic Keyboard
|   bcdDevice            3.90
|   iManufacturer           1 Apple Inc.
|   iProduct                2 Magic Keyboard
|   iSerial                 3 ...
|   bNumConfigurations      1
|   Configuration Descriptor:
|     bLength                 9
|     bDescriptorType         2
|     wTotalLength       0x003b
|     bNumInterfaces          2
|     bConfigurationValue     1
|     iConfiguration          4 Keyboard
|     bmAttributes         0xa0
|       (Bus Powered)
|       Remote Wakeup
|     MaxPower              500mA
|     Interface Descriptor:
|       bLength                 9
|       bDescriptorType         4
|       bInterfaceNumber        0
|       bAlternateSetting       0
|       bNumEndpoints           1
|       bInterfaceClass         3 Human Interface Device
|       bInterfaceSubClass      0 [unknown]
|       bInterfaceProtocol      0
|       iInterface              5 Device Management
|         HID Device Descriptor:
|           bLength                 9
|           bDescriptorType        33
|           bcdHID               1.10
|           bCountryCode            0 Not supported
|           bNumDescriptors         1
|           bDescriptorType        34 Report
|           wDescriptorLength      83
|           Report Descriptors:
|             ** UNAVAILABLE **
|       Endpoint Descriptor:
|         bLength                 7
|         bDescriptorType         5
|         bEndpointAddress     0x81  EP 1 IN
|         bmAttributes            3
|           Transfer Type            Interrupt
|           Synch Type               None
|           Usage Type               Data
|         wMaxPacketSize     0x0010  1x 16 bytes
|         bInterval               8
|     Interface Descriptor:
|       bLength                 9
|       bDescriptorType         4
|       bInterfaceNumber        1
|       bAlternateSetting       0
|       bNumEndpoints           1
|       bInterfaceClass         3 Human Interface Device
|       bInterfaceSubClass      1 Boot Interface Subclass
|       bInterfaceProtocol      1 Keyboard
|       iInterface              6 Keyboard / Boot
|         HID Device Descriptor:
|           bLength                 9
|           bDescriptorType        33
|           bcdHID               1.10
|           bCountryCode           13 International (ISO)
|           bNumDescriptors         1
|           bDescriptorType        34 Report
|           wDescriptorLength     207
|           Report Descriptors:
|             ** UNAVAILABLE **
|       Endpoint Descriptor:
|         bLength                 7
|         bDescriptorType         5
|         bEndpointAddress     0x82  EP 2 IN
|         bmAttributes            3
|           Transfer Type            Interrupt
|           Synch Type               None
|           Usage Type               Data
|         wMaxPacketSize     0x0010  1x 16 bytes
|         bInterval               8

Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Janne Grunau <j@jannau.net>