clk: microchip: convert SOC_MICROCHIP_POLARFIRE to ARCH_MICROCHIP_POLARFIRE

As part of converting RISC-V SOC_FOO symbols to ARCH_FOO to match the
use of such symbols on other architectures, convert the Microchip FPGA
clock drivers to use the new symbol.
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230309204452.969574-2-conor@kernel.org

drivers/clk/microchip/Kconfig

@@ -5,8 +5,8 @@ config COMMON_CLK_PIC32
 
 config MCHP_CLK_MPFS
 	bool "Clk driver for PolarFire SoC"
-	depends on SOC_MICROCHIP_POLARFIRE || COMPILE_TEST
-	default SOC_MICROCHIP_POLARFIRE
+	depends on ARCH_MICROCHIP_POLARFIRE || COMPILE_TEST
+	default ARCH_MICROCHIP_POLARFIRE
 	select AUXILIARY_BUS
 	help
 	  Supports Clock Configuration for PolarFire SoC