ASoC: rt1305: fix ACPI_PTR compile error

This patch added <linux/acpi.h> header

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Shuming Fan <shumingf@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt1305.c

@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/pm.h>
+#include <linux/acpi.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/regmap.h>