soc/tegra: fuse: Move register mapping check

The tegra_read_chipid() function can be called from places other than
tegra_get_chip_id(), so the check for a valid mapping of the MISC
registers needs to be moved to tegra_read_chipid() to catch all
potential accesses.
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/soc/tegra/fuse/tegra-apbmisc.c

@@ -38,17 +38,17 @@ static void __iomem *strapping_base;
 static bool long_ram_code;
 
 u32 tegra_read_chipid(void)
-{
-	return readl_relaxed(apbmisc_base + 4);
-}
-
-u8 tegra_get_chip_id(void)
 {
 	if (!apbmisc_base) {
 		WARN(1, "Tegra Chip ID not yet available\n");
 		return 0;
 	}
 
+	return readl_relaxed(apbmisc_base + 4);
+}
+
+u8 tegra_get_chip_id(void)
+{
 	return (tegra_read_chipid() >> 8) & 0xff;
 }