MIPS: Netlogic: Fix cop0 prid check in AHCI init

PRID register should be masked with IMP_MASK to get processor ID.
Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8883/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/netlogic/xlp/ahci-init.c

@@ -151,7 +151,7 @@ static void nlm_sata_firmware_init(int node)
 static int __init nlm_ahci_init(void)
 {
 	int node = 0;
-	int chip = read_c0_prid() & PRID_REV_MASK;
+	int chip = read_c0_prid() & PRID_IMP_MASK;
 
 	if (chip == PRID_IMP_NETLOGIC_XLP3XX)
 		nlm_sata_firmware_init(node);