MIPS: tlbex: Simplify r3k check

We already know whether a CPU has r3k style exceptions, including TLB
exceptions, by checking cpu_has_3kex. Remove the list of CPU types in
build_tlb_refill_handler() & check cpu_has_3kex instead.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org

arch/mips/mm/tlbex.c

@@ -2607,14 +2607,7 @@ void build_tlb_refill_handler(void)
 	check_for_high_segbits = current_cpu_data.vmbits > (PGDIR_SHIFT + PGD_ORDER + PAGE_SHIFT - 3);
 #endif
 
-	switch (current_cpu_type()) {
-	case CPU_R2000:
-	case CPU_R3000:
-	case CPU_R3000A:
-	case CPU_R3081E:
-	case CPU_TX3912:
-	case CPU_TX3922:
-	case CPU_TX3927:
+	if (cpu_has_3kex) {
 #ifndef CONFIG_MIPS_PGD_C0_CONTEXT
 		if (cpu_has_local_ebase)
 			build_r3000_tlb_refill_handler();
@@ -2631,9 +2624,9 @@ void build_tlb_refill_handler(void)
 #else
 		panic("No R3000 TLB refill handler");
 #endif
-		break;
+		return;
+	}
 
-	default:
 	if (cpu_has_ldpte)
 		setup_pw();
 
@@ -2656,5 +2649,4 @@ void build_tlb_refill_handler(void)
 		config_xpa_params();
 	if (cpu_has_htw)
 		config_htw_params();
-	}
 }