MIPS: Loongson: Rename PRID_IMP_LOONGSON1 and PRID_IMP_LOONGSON2

Loongson-1 is a 32-bit MIPS CPU and Loongson-2/3 are 64-bit MIPS CPUs,
and both Loongson-2/3 has the same PRID IMP filed (0x6300). As a
result, renaming PRID_IMP_LOONGSON1 and PRID_IMP_LOONGSON2 to
PRID_IMP_LOONGSON_32 and PRID_IMP_LOONGSON_64 will make more sense.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Tested-by: Alex Smith <alex.smith@imgtec.com>
Reviewed-by: Alex Smith <alex.smith@imgtec.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6552/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/cpu.h

@@ -82,10 +82,10 @@
 #define PRID_IMP_RM7000		0x2700
 #define PRID_IMP_NEVADA		0x2800		/* RM5260 ??? */
 #define PRID_IMP_RM9000		0x3400
-#define PRID_IMP_LOONGSON1	0x4200
+#define PRID_IMP_LOONGSON_32	0x4200  /* Loongson-1 */
 #define PRID_IMP_R5432		0x5400
 #define PRID_IMP_R5500		0x5500
-#define PRID_IMP_LOONGSON2	0x6300
+#define PRID_IMP_LOONGSON_64	0x6300  /* Loongson-2/3 */
 
 #define PRID_IMP_UNKNOWN	0xff00
 

arch/mips/kernel/cpu-probe.c

@@ -734,7 +734,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
 			     MIPS_CPU_LLSC;
 		c->tlbsize = 64;
 		break;
-	case PRID_IMP_LOONGSON2:
+	case PRID_IMP_LOONGSON_64:  /* Loongson-2/3 */
 		c->cputype = CPU_LOONGSON2;
 		__cpu_name[cpu] = "ICT Loongson-2";
 
@@ -753,7 +753,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
 			     MIPS_CPU_32FPR;
 		c->tlbsize = 64;
 		break;
-	case PRID_IMP_LOONGSON1:
+	case PRID_IMP_LOONGSON_32:  /* Loongson-1 */
 		decode_configs(c);
 
 		c->cputype = CPU_LOONGSON1;