nvmem: u-boot-env: align endianness of crc32 values

This patch fixes crc32 error on Big-Endianness system by conversion of
calculated crc32 value.

Little-Endianness system:

  obtained crc32: Little
calculated crc32: Little

Big-Endianness system:

  obtained crc32: Little
calculated crc32: Big

log (APRESIA ApresiaLightGS120GT-SS, RTL8382M, Big-Endianness):

[    8.570000] u_boot_env 18001200.spi:flash@0:partitions:partition@c0000: Invalid calculated CRC32: 0x88cd6f09 (expected: 0x096fcd88)
[    8.580000] u_boot_env: probe of 18001200.spi:flash@0:partitions:partition@c0000 failed with error -22

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>

drivers/nvmem/u-boot-env.c

@@ -143,7 +143,7 @@ static int u_boot_env_parse(struct u_boot_env *priv)
 	crc32_data_len = priv->mtd->size - crc32_data_offset;
 	data_len = priv->mtd->size - data_offset;
 
-	calc = crc32(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L;
+	calc = le32_to_cpu(crc32(~0, buf + crc32_data_offset, crc32_data_len) ^ ~0L);
 	if (calc != crc32) {
 		dev_err(dev, "Invalid calculated CRC32: 0x%08x (expected: 0x%08x)\n", calc, crc32);
 		err = -EINVAL;