target/mips/mips-defs: Use ISA_MIPS32R3 definition to check Release 3

Use the single ISA_MIPS32R3 definition to check if the Release 3
ISA is supported, whether the CPU support 32/64-bit.

For now we keep '32' in the definition name, we will rename it
as ISA_MIPS_R3 in few commits.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210104221154.3127610-9-f4bug@amsat.org>

target/mips/mips-defs.h

@@ -19,7 +19,6 @@
 #define ISA_MIPS32        0x0000000000000020ULL
 #define ISA_MIPS32R2      0x0000000000000040ULL
 #define ISA_MIPS32R3      0x0000000000000200ULL
-#define ISA_MIPS64R3      0x0000000000000400ULL
 #define ISA_MIPS32R5      0x0000000000000800ULL
 #define ISA_MIPS64R5      0x0000000000001000ULL
 #define ISA_MIPS32R6      0x0000000000002000ULL
@@ -81,7 +80,7 @@
 
 /* MIPS Technologies "Release 3" */
 #define CPU_MIPS32R3    (CPU_MIPS32R2 | ISA_MIPS32R3)
-#define CPU_MIPS64R3    (CPU_MIPS64R2 | CPU_MIPS32R3 | ISA_MIPS64R3)
+#define CPU_MIPS64R3    (CPU_MIPS64R2 | CPU_MIPS32R3)
 
 /* MIPS Technologies "Release 5" */
 #define CPU_MIPS32R5    (CPU_MIPS32R3 | ISA_MIPS32R5)