regmap: Rename ret variable in regmap_read_poll_timeout

As almost all of the callers of the regmap_read_poll_timeout macro
will include a local ret variable we will always get a Sparse warning
about the duplication of the ret variable:

warning: symbol 'ret' shadows an earlier one

Simply rename the ret variable in the marco to pollret to make this
significantly less likely to happen.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/linux/regmap.h

@@ -116,22 +116,22 @@ struct reg_sequence {
 #define regmap_read_poll_timeout(map, addr, val, cond, sleep_us, timeout_us) \
 ({ \
 	ktime_t timeout = ktime_add_us(ktime_get(), timeout_us); \
-	int ret; \
+	int pollret; \
 	might_sleep_if(sleep_us); \
 	for (;;) { \
-		ret = regmap_read((map), (addr), &(val)); \
-		if (ret) \
+		pollret = regmap_read((map), (addr), &(val)); \
+		if (pollret) \
 			break; \
 		if (cond) \
 			break; \
 		if (timeout_us && ktime_compare(ktime_get(), timeout) > 0) { \
-			ret = regmap_read((map), (addr), &(val)); \
+			pollret = regmap_read((map), (addr), &(val)); \
 			break; \
 		} \
 		if (sleep_us) \
 			usleep_range((sleep_us >> 2) + 1, sleep_us); \
 	} \
-	ret ?: ((cond) ? 0 : -ETIMEDOUT); \
+	pollret ?: ((cond) ? 0 : -ETIMEDOUT); \
 })
 
 #ifdef CONFIG_REGMAP