riscv: dts: microchip: convert spaces to tabs for the discokit

commit d02aa1a6e10ec2737f1bbab3def9a8df3ed1f90f from
https://github.com/linux4microchip/linux.git

 linux-6.6-mchp+fpga

Our mail server converted tabs in the patches to 7-width spaces and I
didn't catch it before applying. Try to fix it.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: harish h <harish.h@windriver.com>