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: NMarkos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10645/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/mips-cpc.c

@@ -23,7 +23,7 @@ static DEFINE_PER_CPU_ALIGNED(unsigned long, cpc_core_lock_flags);
 
 phys_addr_t __weak mips_cpc_phys_base(void)
 {
-	u32 cpc_base;
+	unsigned long cpc_base;
 
 	if (!mips_cm_present())
 		return 0;