riscv: dts: microchip: remove POLARFIRE mention in Makefile

Substitute user hidden CONFIG_ARCH_MICROCHIP_POLARFIRE by user visible
CONFIG_ARCH_MICROCHIP.

Signed-off-by: Pierre-Henry Moussay <pierre-henry.moussay@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

Author: Pierre-Henry Moussay

arch/riscv/boot/dts/microchip/Makefile

@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
-dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-beaglev-fire.dtb
-dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-disco-kit.dtb
-dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-icicle-kit.dtb
-dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-icicle-kit-prod.dtb
-dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-m100pfsevp.dtb
-dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-polarberry.dtb
-dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-sev-kit.dtb
-dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-tysom-m.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-beaglev-fire.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-disco-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-icicle-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-icicle-kit-prod.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-m100pfsevp.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-polarberry.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-sev-kit.dtb
+dtb-$(CONFIG_ARCH_MICROCHIP) += mpfs-tysom-m.dtb
 dtb-$(CONFIG_ARCH_MICROCHIP) += pic64gx-curiosity-kit.dtb