char/genrtc: x86: remove remnants of asm/rtc.h

Commit 3195ef59cb ("x86: Do full rtc synchronization with ntp") had
the side-effect of unconditionally enabling the RTC_LIB symbol on x86,
which in turn disables the selection of the CONFIG_RTC and
CONFIG_GEN_RTC drivers that contain a two older implementations of
the CONFIG_RTC_DRV_CMOS driver.

This removes x86 from the list for genrtc, and changes all references
to the asm/rtc.h header to instead point to the interfaces
from linux/mc146818rtc.h.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

drivers/base/power/trace.c

@@ -11,7 +11,7 @@
 #include <linux/export.h>
 #include <linux/rtc.h>
 
-#include <asm/rtc.h>
+#include <linux/mc146818rtc.h>
 
 #include "power.h"
 
@@ -103,7 +103,7 @@ static int set_magic_time(unsigned int user, unsigned int file, unsigned int dev
 	n /= 24;
 	time.tm_min = (n % 20) * 3;
 	n /= 20;
-	set_rtc_time(&time);
+	mc146818_set_time(&time);
 	return n ? -1 : 0;
 }
 
@@ -112,7 +112,7 @@ static unsigned int read_magic_time(void)
 	struct rtc_time time;
 	unsigned int val;
 
-	get_rtc_time(&time);
+	mc146818_get_time(&time);
 	pr_info("RTC time: %2d:%02d:%02d, date: %02d/%02d/%02d\n",
 		time.tm_hour, time.tm_min, time.tm_sec,
 		time.tm_mon + 1, time.tm_mday, time.tm_year % 100);