MIPS: JZ4740: introduce CONFIG_MACH_INGENIC

In preparation for supporting Ingenic SoCs other than the JZ4740,
introduce MACH_INGENIC to Kconfig & move MACH_JZ4740 to a separate
entry selected by the board when appropriate. This allows MACH_INGENIC
to be used to enable things generic across Ingenic SoCs.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Andrew Bresticker <abrestic@chromium.org>
Patchwork: https://patchwork.linux-mips.org/patch/10130/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -289,9 +289,8 @@ config MACH_JAZZ
 	 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millennium and
 	 Olivetti M700-10 workstations.
 
-config MACH_JZ4740
-	bool "Ingenic JZ4740 based machines"
-	select SYS_HAS_CPU_MIPS32_R1
+config MACH_INGENIC
+	bool "Ingenic SoC based machines"
 	select SYS_SUPPORTS_32BIT_KERNEL
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 	select SYS_SUPPORTS_ZBOOT_UART16550

arch/mips/configs/qi_lb60_defconfig

-CONFIG_MACH_JZ4740=y
+CONFIG_MACH_INGENIC=y
 # CONFIG_COMPACTION is not set
 # CONFIG_CROSS_MEMORY_ATTACH is not set
 CONFIG_HZ_100=y

arch/mips/jz4740/Kconfig

 choice
 	prompt "Machine type"
-	depends on MACH_JZ4740
+	depends on MACH_INGENIC
 	default JZ4740_QI_LB60
 
 config JZ4740_QI_LB60
 	bool "Qi Hardware Ben NanoNote"
+	select MACH_JZ4740
 
 endchoice
+
+config MACH_JZ4740
+	bool
+	select SYS_HAS_CPU_MIPS32_R1

arch/mips/jz4740/Platform

-platform-$(CONFIG_MACH_JZ4740)	+= jz4740/
-cflags-$(CONFIG_MACH_JZ4740)	+= -I$(srctree)/arch/mips/include/asm/mach-jz4740
-load-$(CONFIG_MACH_JZ4740)	+= 0xffffffff80010000
-zload-$(CONFIG_MACH_JZ4740)	+= 0xffffffff80600000
+platform-$(CONFIG_MACH_INGENIC)	+= jz4740/
+cflags-$(CONFIG_MACH_INGENIC)	+= -I$(srctree)/arch/mips/include/asm/mach-jz4740
+load-$(CONFIG_MACH_INGENIC)	+= 0xffffffff80010000
+zload-$(CONFIG_MACH_INGENIC)	+= 0xffffffff80600000