MIPS: Add M6250 PRID & cpu_type_enum values

Define the processor ID for the M6250 CPU and add a value to the enum
cpu_type_enum for the core.

[ralf@linux-mips.org: Fix merge conflict.]
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Joshua Kinard <kumba@gentoo.org>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12373/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/cpu.h

@@ -122,6 +122,7 @@
 #define PRID_IMP_M5150		0xa700
 #define PRID_IMP_P5600		0xa800
 #define PRID_IMP_I6400		0xa900
+#define PRID_IMP_M6250		0xab00
 
 /*
  * These are the PRID's for when 23:16 == PRID_COMP_SIBYTE
@@ -311,7 +312,7 @@ enum cpu_type_enum {
 	CPU_ALCHEMY, CPU_PR4450, CPU_BMIPS32, CPU_BMIPS3300, CPU_BMIPS4350,
 	CPU_BMIPS4380, CPU_BMIPS5000, CPU_JZRISC, CPU_LOONGSON1, CPU_M14KC,
 	CPU_M14KEC, CPU_INTERAPTIV, CPU_P5600, CPU_PROAPTIV, CPU_1074K,
-	CPU_M5150, CPU_I6400, CPU_P6600,
+	CPU_M5150, CPU_I6400, CPU_P6600, CPU_M6250,
 
 	/*
 	 * MIPS64 class processors