drivers/rtc/rtc-efi.c: avoid subtracting day twice when computing year days

Compared source code of rtc-lib.c::rtc_year_days() with
efirtc.c::rtc_year_days(), found the code in rtc-efi decreases value of
day twice when it computing year days. rtc-lib.c::rtc_year_days() has
already decrease days and return the year days from 0 to 365.

Signed-off-by: Lee, Chun-Yi <[e-mail]>
Cc: Alessandro Zummo <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/rtc/rtc-efi.c

···
 compute_yday(efi_time_t *eft)
 {
 	/* efi_time_t.month is in the [1-12] so, we need -1 */
-	return rtc_year_days(eft->day - 1, eft->month - 1, eft->year);
+	return rtc_year_days(eft->day, eft->month - 1, eft->year);
 }
 /*
  * returns day of the week [0-6] 0=Sunday