regmap: Add missing initialization of this_page

drivers/base/regmap/regmap.c: In function ‘_regmap_range_multi_paged_reg_write’:
drivers/base/regmap/regmap.c:1665: warning: ‘this_page’ may be used uninitialized in this function

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 9596f30..3586975 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1665,7 +1665,7 @@
 	int ret;
 	int i, n;
 	struct reg_default *base;
-	unsigned int this_page;
+	unsigned int this_page = 0;
 	/*
 	 * the set of registers are not neccessarily in order, but
 	 * since the order of write must be preserved this algorithm