fix types for mips sigcontext/mcontext_t regset members

arch/mips/bits/signal.h

@@ -19,14 +19,18 @@ typedef struct {
 } fpregset_t;
 struct sigcontext {
 	unsigned sc_regmask, sc_status;
-	unsigned long long sc_pc, sc_regs[32], sc_fpregs[32];
+	unsigned long long sc_pc;
+	gregset_t sc_regs;
+	fpregset_t sc_fpregs;
 	unsigned sc_ownedfp, sc_fpc_csr, sc_fpc_eir, sc_used_math, sc_dsp;
 	unsigned long long sc_mdhi, sc_mdlo;
 	unsigned long sc_hi1, sc_lo1, sc_hi2, sc_lo2, sc_hi3, sc_lo3;
 };
 typedef struct {
 	unsigned regmask, status;
-	unsigned long long pc, gregs[32], fpregs[32];
+	unsigned long long pc;
+	gregset_t gregs;
+	fpregset_t fpregs;
 	unsigned ownedfp, fpc_csr, fpc_eir, used_math, dsp;
 	unsigned long long mdhi, mdlo;
 	unsigned long hi1, lo1, hi2, lo2, hi3, lo3;