ARMV7: Fix pad mux for Panda LEDs

ARMV7: Fix pad mux for Panda LEDs

Correctly set PAD1_FREF_CLK4_REQ and PAD0_FREF_CLK4_OUT to enable and
activate both LEDs while setting pad mux.

Since this increases the line length, this patch also adjusts the white
space in this section of code to allign the pad mux signal description
comments.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>