rtc-pcf8563-guf: Fix rtc-pcf8563-guf build

Somehow the Garz & Fricke specific PCF8563 driver rtc-pcf8563-guf was
not buildable.

On cause was a missing and unused config.h file. Remove this file from
the recipe.

Another error was due to the removal of the register resets in the
PCF8563 that should be prevented by the driver. However the buffer
variable is used later on so we cannot comment it out.

recipes-kernel/modules/rtc-pcf8563-guf.bb

@@ -11,7 +11,6 @@ inherit module
 
 SRC_URI = "file://Makefile \
            file://rtc-pcf8563-guf.c \
-           file://config.h \
           "
 S = "${WORKDIR}"
 

recipes-kernel/modules/rtc-pcf8563-guf/rtc-pcf8563-guf.c

@@ -549,9 +549,7 @@ static int pcf8563_probe(struct i2c_client *client,
 {
 	struct pcf8563 *pcf8563;
 	int err;
-#if 0
 	unsigned char buf;
-#endif
 
 	dev_dbg(&client->dev, "%s\n", __func__);