reset: Rename free() to rfree()

This function name conflicts with our desire to #define free() to
something else on sandbox. Since it deals with resources, rename it to
rfree().

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/reset/stm32-reset.c

@@ -64,7 +64,7 @@ static int stm32_reset_deassert(struct reset_ctl *reset_ctl)
 
 static const struct reset_ops stm32_reset_ops = {
 	.request	= stm32_reset_request,
-	.free		= stm32_reset_free,
+	.rfree		= stm32_reset_free,
 	.rst_assert	= stm32_reset_assert,
 	.rst_deassert	= stm32_reset_deassert,
 };