MIPS: Fix typo for user_ld macro definition

There is typo for macro user_ld if __ASSEMBLY__ is declared, this
patch fixes this issue.
Signed-off-by: Nbibo mao <maobibo@loongson.cn>
Signed-off-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/include/asm/asm-eva.h

@@ -180,7 +180,7 @@
 #define user_ld(reg, addr)		kernel_lw(reg, addr)
 #else
 #define user_sd(reg, addr)		kernel_sd(reg, addr)
-#define user_ld(reg, addr)		kernel_sd(reg, addr)
+#define user_ld(reg, addr)		kernel_ld(reg, addr)
 #endif /* CONFIG_32BIT */
 
 #endif /* CONFIG_EVA */