dt-bindings: remoteproc: miv-remoteproc: remove redundant quotes causing warnings

commit 43938d01e8e0dec69247cc42d949613d803bd554 from
https://github.com/linux4microchip/linux.git

 linux-6.6-mchp+fpga

Fix:
../Documentation/devicetree/bindings/remoteproc/microchip,miv-remoteproc.yaml:5:10: [error] string value is redundantly quoted with any quotes (quoted-strings)

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