MIPS: BMIPS: Fix up Kconfig settings

Factor out common BMIPS options into "CPU_BMIPS".  Add L2 cache for
BMIPS5000.  Add CPU_MIPS32 to satisfy checks in page.h, r4k_switch.S,
tlb-r4k.c, etc.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2953/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -1413,51 +1413,36 @@ config CPU_CAVIUM_OCTEON
 config CPU_BMIPS3300
 	bool "BMIPS3300"
 	depends on SYS_HAS_CPU_BMIPS3300
-	select DMA_NONCOHERENT
-	select IRQ_CPU
-	select SWAP_IO_SPACE
-	select SYS_SUPPORTS_32BIT_KERNEL
-	select WEAK_ORDERING
+	select CPU_BMIPS
 	help
 	  Broadcom BMIPS3300 processors.
 
 config CPU_BMIPS4350
 	bool "BMIPS4350"
 	depends on SYS_HAS_CPU_BMIPS4350
-	select CPU_SUPPORTS_32BIT_KERNEL
-	select DMA_NONCOHERENT
-	select IRQ_CPU
-	select SWAP_IO_SPACE
+	select CPU_BMIPS
 	select SYS_SUPPORTS_SMP
 	select SYS_SUPPORTS_HOTPLUG_CPU
-	select WEAK_ORDERING
 	help
 	  Broadcom BMIPS4350 ("VIPER") processors.
 
 config CPU_BMIPS4380
 	bool "BMIPS4380"
 	depends on SYS_HAS_CPU_BMIPS4380
-	select CPU_SUPPORTS_32BIT_KERNEL
-	select DMA_NONCOHERENT
-	select IRQ_CPU
-	select SWAP_IO_SPACE
+	select CPU_BMIPS
 	select SYS_SUPPORTS_SMP
 	select SYS_SUPPORTS_HOTPLUG_CPU
-	select WEAK_ORDERING
 	help
 	  Broadcom BMIPS4380 processors.
 
 config CPU_BMIPS5000
 	bool "BMIPS5000"
 	depends on SYS_HAS_CPU_BMIPS5000
-	select CPU_SUPPORTS_32BIT_KERNEL
+	select CPU_BMIPS
 	select CPU_SUPPORTS_HIGHMEM
-	select DMA_NONCOHERENT
-	select IRQ_CPU
-	select SWAP_IO_SPACE
+	select MIPS_CPU_SCACHE
 	select SYS_SUPPORTS_SMP
 	select SYS_SUPPORTS_HOTPLUG_CPU
-	select WEAK_ORDERING
 	help
 	  Broadcom BMIPS5000 processors.
 
@@ -1518,6 +1503,15 @@ config CPU_LOONGSON2
 	select CPU_SUPPORTS_64BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 
+config CPU_BMIPS
+	bool
+	select CPU_MIPS32
+	select CPU_SUPPORTS_32BIT_KERNEL
+	select DMA_NONCOHERENT
+	select IRQ_CPU
+	select SWAP_IO_SPACE
+	select WEAK_ORDERING
+
 config SYS_HAS_CPU_LOONGSON2E
 	bool