fix(drivers/nxp/sfp): fix compile warning

Fix compile warning that ‘mask’ may be used uninitialized.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: I75a443dbc36d7bd174fe317616fd95cd096306fc
diff --git a/drivers/nxp/sfp/fuse_prov.c b/drivers/nxp/sfp/fuse_prov.c
index 4d30f5f..165474f 100644
--- a/drivers/nxp/sfp/fuse_prov.c
+++ b/drivers/nxp/sfp/fuse_prov.c
@@ -326,7 +326,7 @@
 		      struct sfp_ccsr_regs_t *sfp_ccsr_regs)
 {
 	int ret;
-	uint32_t mask;
+	uint32_t mask = 0;
 
 #ifdef NXP_SFP_VER_3_4
 	if (((fuse_hdr->flags >> FLAG_MC_SHIFT) & 0x1) != 0) {