rtc: Makefile: Replace spaces with tab.

Fix a style error.

Signed-off-by: Tóth János <gomba007@gmail.com>
Link: https://lore.kernel.org/r/20240930-rtc-makefile-spaces-v1-1-e936e0a7b02a@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: g0mb4

drivers/rtc/Makefile

@@ -165,7 +165,7 @@ obj-$(CONFIG_RTC_DRV_S5M)	+= rtc-s5m.o
 obj-$(CONFIG_RTC_DRV_SA1100)	+= rtc-sa1100.o
 obj-$(CONFIG_RTC_DRV_SC27XX)	+= rtc-sc27xx.o
 obj-$(CONFIG_RTC_DRV_SD2405AL)	+= rtc-sd2405al.o
-obj-$(CONFIG_RTC_DRV_SD3078)   += rtc-sd3078.o
+obj-$(CONFIG_RTC_DRV_SD3078)	+= rtc-sd3078.o
 obj-$(CONFIG_RTC_DRV_SH)	+= rtc-sh.o
 obj-$(CONFIG_RTC_DRV_SNVS)	+= rtc-snvs.o
 obj-$(CONFIG_RTC_DRV_SPEAR)	+= rtc-spear.o