MIPS: CPC: Fix type for GCR CPC base reg for 64-bit

The GCR CPC base register is 64-bit on 64-bit processors so use the
appropriate field.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10645/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/mips-cpc.c b/arch/mips/kernel/mips-cpc.c
index 1196450..e05aca4 100644
--- a/arch/mips/kernel/mips-cpc.c
+++ b/arch/mips/kernel/mips-cpc.c
@@ -23,7 +23,7 @@
 
 phys_addr_t __weak mips_cpc_phys_base(void)
 {
-	u32 cpc_base;
+	unsigned long cpc_base;
 
 	if (!mips_cm_present())
 		return 0;