x86: tangier: pinmux: Move is_protected assignment closer to its user

Move is_protected assignment closer to its user.
This increases readability and makes maintenance easier.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/tangier/pinmux.c b/arch/x86/cpu/tangier/pinmux.c
index 8385167..883860f 100644
--- a/arch/x86/cpu/tangier/pinmux.c
+++ b/arch/x86/cpu/tangier/pinmux.c
@@ -162,8 +162,6 @@
 	u32 mask;
 	int ret;
 
-	is_protected = ofnode_read_bool(pin_node, "protected");
-
 	pad_offset = ofnode_read_s32_default(pin_node, "pad-offset", -1);
 	if (pad_offset == -1)
 		return -EINVAL;
@@ -178,6 +176,7 @@
 	if (mode & ~mask)
 		return -ENOTSUPP;
 
+	is_protected = ofnode_read_bool(pin_node, "protected");
 	if (is_protected)
 		ret = mrfld_pinconfig_protected(pad_offset, mask, mode);
 	else