rtc: jz4740: make the driver builtin only

Since the driver is now calling machine_halt() that is not exported, it has
to be built in the kernel. Building it as a module will fail at linking
time.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

drivers/rtc/Kconfig

@@ -1550,15 +1550,12 @@ config RTC_DRV_MPC5121
 	  will be called rtc-mpc5121.
 
 config RTC_DRV_JZ4740
-	tristate "Ingenic JZ4740 SoC"
+	bool "Ingenic JZ4740 SoC"
 	depends on MACH_INGENIC || COMPILE_TEST
 	help
 	  If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
 	  controllers.
 
-	  This driver can also be buillt as a module. If so, the module
-	  will be called rtc-jz4740.
-
 config RTC_DRV_LPC24XX
 	tristate "NXP RTC for LPC178x/18xx/408x/43xx"
 	depends on ARCH_LPC18XX || COMPILE_TEST

drivers/rtc/rtc-jz4740.c

@@ -17,7 +17,6 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
-#include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/reboot.h>
@@ -303,7 +302,6 @@ static const struct of_device_id jz4740_rtc_of_match[] = {
 	{ .compatible = "ingenic,jz4780-rtc", .data = (void *)ID_JZ4780 },
 	{},
 };
-MODULE_DEVICE_TABLE(of, jz4740_rtc_of_match);
 
 static int jz4740_rtc_probe(struct platform_device *pdev)
 {
@@ -431,7 +429,6 @@ static const struct platform_device_id jz4740_rtc_ids[] = {
 	{ "jz4780-rtc", ID_JZ4780 },
 	{}
 };
-MODULE_DEVICE_TABLE(platform, jz4740_rtc_ids);
 
 static struct platform_driver jz4740_rtc_driver = {
 	.probe	 = jz4740_rtc_probe,
@@ -443,9 +440,4 @@ static struct platform_driver jz4740_rtc_driver = {
 	.id_table = jz4740_rtc_ids,
 };
 
-module_platform_driver(jz4740_rtc_driver);
-
-MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("RTC driver for the JZ4740 SoC\n");
-MODULE_ALIAS("platform:jz4740-rtc");
+builtin_platform_driver(jz4740_rtc_driver);