elf: Fix PT_MIPS_XXX constants

Fix existing and add missing PT_MIPS_XXX constants in elf.h.
This is copied from kernel header arch/mips/include/asm/elf.h.

Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>

include/elf.h

@@ -28,8 +28,11 @@ typedef int64_t  Elf64_Sxword;
 #define PT_PHDR    6
 #define PT_LOPROC  0x70000000
 #define PT_HIPROC  0x7fffffff
-#define PT_MIPS_REGINFO		0x70000000
-#define PT_MIPS_OPTIONS		0x70000001
+
+#define PT_MIPS_REGINFO   0x70000000
+#define PT_MIPS_RTPROC    0x70000001
+#define PT_MIPS_OPTIONS   0x70000002
+#define PT_MIPS_ABIFLAGS  0x70000003
 
 /* Flags in the e_flags field of the header */
 /* MIPS architecture level. */