soc: canaan: Deprecate SOC_CANAAN and use SOC_CANAAN_K210 for K210

Since SOC_FOO should be deprecated from patch [1], and cleanup for other
SoCs is already in the mailing list [2,3,4], we remove the use of
SOC_CANAAN and use ARCH_CANAAN for SoCs vendored by Canaan instead from now
on. Thus, we should also change the Makefile here to use ARCH_CANAAN.

Then, since we have introduced SOC_CANAAN_K210 for K210-specific drivers,
we should replace its drivers depends on SOC_CANAAN_K210 and default select
when it has the symbol SOC_CANAAN_K210.

[1] https://lore.kernel.org/linux-riscv/20221121221414.109965-1-conor@kernel.org/
[2] https://lore.kernel.org/linux-riscv/20240305-praying-clad-c4fbcaa7ed0a@spud/
[3] https://lore.kernel.org/linux-riscv/20240305-fled-undrilled-41dc0c46bb29@spud/
[4] https://lore.kernel.org/linux-riscv/20240305-stress-earflap-d7ddb8655a4d@spud/

Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Acked-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

drivers/soc/Makefile

@@ -7,7 +7,7 @@ obj-y				+= apple/
 obj-y				+= aspeed/
 obj-$(CONFIG_ARCH_AT91)		+= atmel/
 obj-y				+= bcm/
-obj-$(CONFIG_SOC_CANAAN)	+= canaan/
+obj-$(CONFIG_ARCH_CANAAN)	+= canaan/
 obj-$(CONFIG_ARCH_DOVE)		+= dove/
 obj-$(CONFIG_MACH_DOVE)		+= dove/
 obj-y				+= fsl/

drivers/soc/canaan/Kconfig

@@ -2,9 +2,9 @@
 
 config SOC_K210_SYSCTL
 	bool "Canaan Kendryte K210 SoC system controller"
-	depends on RISCV && SOC_CANAAN && OF
+	depends on RISCV && SOC_CANAAN_K210 && OF
 	depends on COMMON_CLK_K210
-	default SOC_CANAAN
+	default SOC_CANAAN_K210
 	select PM
 	select MFD_SYSCON
 	help