Change in coreboot[master]: lib/rtc: Remove unnecessary year constraint in rtc_calc_weekday

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/52347 )

Change subject: lib/rtc: Remove unnecessary year constraint in rtc_calc_weekday
......................................................................

lib/rtc: Remove unnecessary year constraint in rtc_calc_weekday

Algorithm used to calculate weekday is now based on Zeller's rule, so it
does not need if statement constraining year to 1971 and later.

Signed-off-by: Jakub Czapiga 
Change-Id: I25e2e6a1c9b2fb1ac2576e028b580db0ea474d37
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52347
Tested-by: build bot (Jenkins) 
Reviewed-by: Paul Fagerburg 
---
M src/lib/rtc.c
1 file changed, 0 insertions(+), 3 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Paul Fagerburg: Looks good to me, approved

diff --git a/src/lib/rtc.c b/src/lib/rtc.c
index 258f4ac..5e03cfa 100644
--- a/src/lib/rtc.c
+++ b/src/lib/rtc.c
@@ -22,9 +22,6 @@
 /* Zeller's rule */
 static int rtc_calc_weekday(struct rtc_time *tm)
 {
-	if (tm->year < 1971)
-		return -1;
-
    /* In Zeller's rule, January and February are treated as if they
       are months 13 and 14 of the previous year (March is still month 3) */
    const int zyear = ((tm->mon < 3) ? tm->year - 1 : tm->year);