mips: add comments on mips32 & mips64 to capstone.h
diff --git a/include/capstone.h b/include/capstone.h
index 2954cf1..6040c9e 100644
--- a/include/capstone.h
+++ b/include/capstone.h
@@ -76,8 +76,8 @@
 	CS_MODE_LITTLE_ENDIAN = 0,	// little endian mode (default mode)
 	CS_MODE_ARM = 0,	// 32-bit ARM
 	CS_MODE_16 = 1 << 1,	// 16-bit mode
-	CS_MODE_32 = 1 << 2,	// 32-bit mode
-	CS_MODE_64 = 1 << 3,	// 64-bit mode
+	CS_MODE_32 = 1 << 2,	// 32-bit mode. Also use for MIPS32 ISA
+	CS_MODE_64 = 1 << 3,	// 64-bit mode. Also use for MIPS64 ISA
 	CS_MODE_THUMB = 1 << 4,	// ARM's Thumb mode, including Thumb-2
 	CS_MODE_MCLASS = 1 << 5,	// ARM's Cortex-M series
 	CS_MODE_V8 = 1 << 6,	// ARMv8 A32 encodings for ARM