GPMC modes added in bone-common in univ | BeagleWire overlays added

Created by: ombhilare999

Earlier it was not possible to use config-pin utility with GPMC as there were no defined gpmc modes in pinux of bone common file, So I tried adding them after discussion with @lorforlinux. I got everything worked now.

1. For all the pins I had added gpmc_pin mode here first: https://github.com/BeagleWire/BeagleBoard-DeviceTrees/blob/a7bd4fd23d56003146fcd426f52a7b627abcc512/src/arm/am335x-bone-common-univ.dtsi#L199-L200
2. Afterwards Also added the same pin mode in pinmux to show on config-pin side: https://github.com/BeagleWire/BeagleBoard-DeviceTrees/blob/a7bd4fd23d56003146fcd426f52a7b627abcc512/src/arm/am335x-bone-common-univ.dtsi#L1603-L1614
3. I have also added phandle for gpmc too in bone bus file: https://github.com/BeagleWire/BeagleBoard-DeviceTrees/blob/a7bd4fd23d56003146fcd426f52a7b627abcc512/src/arm/bbb-bone-buses.dtsi#L427-L430
4. Finally added the BeagleWire overlay too in src/arn/overlays:
   • BW-ICE40Cape-00A0.dts
   • BW-ICE40Cape-00A0_LKM.dts

Demo of working video: https://asciinema.org/a/ICSlldHwYC4RtOHG0oJkIRUBd

regards, Omkar Bhilare ombhilare999@gmail.com