dm: adc: imx93-adc depends on ADC (fix boot)

dm: adc: imx93-adc depends on ADC (fix boot)

The i.MX93 11x11 EVK fails to boot with following error:

 Model: NXP i.MX93 11X11 EVK board
 DRAM:  2 GiB
 Error binding driver 'imx93-adc': -96
 Some drivers failed to bind
 Error binding driver 'simple_bus': -96
 Some drivers failed to bind
 Error binding driver 'simple_bus': -96
 Some drivers failed to bind
 initcall sequence 00000000fffb8f28 failed at call 000000008021e0d4 (err=-96)
 ### ERROR ### Please RESET the board ###

That's because since commit e7ff54d96303 ("imx93_evk: defconfig: add adc
support") CONFIG_ADC_IMX93 is enabled but CONFIG_ADC is not.
Fix this by enabling CONFIG_ADC in imx93_11x11_evk_defconfig.

Make sure this situation won't happen again in future i.MX93 defconfig by
making CONFIG_ADC_IMX93 depend on CONFIG_ADC.

Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>