ASoC: meson: fix do_div warning in spdifin

Even if this spdif input driver is only supposed to be used on 64bits
platform, there is possible problem with 32bits and do_div, as reported
by the kbuild robot. Just fix it.

Fixes: 5ce56583 ("ASoC: meson: add axg spdif input")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/meson/axg-spdifin.c

@@ -146,8 +146,8 @@ static void axg_spdifin_write_mode_param(struct regmap *map, int mode,
 					 unsigned int base_reg,
 					 unsigned int width)
 {
-	unsigned int offset = mode, rem;
-	unsigned int reg, shift;
+	uint64_t offset = mode;
+	unsigned int reg, shift, rem;
 
 	rem = do_div(offset, num_per_reg);