arm64: defconfig: Enable GPIO and I2C configs for TI's J721e platform

Add configs to enable regulators that supply power to the SD card
on TI's J721e platform. These regulators are controlled by either
SoC gpios or gpios over i2c expander.

Changes to vmlinux size:
Before:
   text	    data     bss       dec       hex	  filename
20219067  10875634  523924   31618625   1e27641	  vmlinux

After:
   text     data     bss	dec	 hex	  filename
20228755  10880422  524628   31633805	1e2b18d   vmlinux

delta: 15180 (dec)

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Link: https://lore.kernel.org/r/20201103190821.30937-1-faiz_abbas@ti.com