mb/siemens/fa_ehl: Remove RTC RV3028C7

Delete this RTC from the configuration as fa_ehl mainboard
uses a different real time clock.

Signed-off-by: Johannes Hahn <johannes-hahn@siemens.com>
Change-Id: Ifd6b68d05a094cb4c890f1ffce62d89b771e23c3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77352
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
Reviewed-by: Uwe Poeche <uwe.poeche@siemens.com>
diff --git a/src/mainboard/siemens/fa_ehl/variants/fa_ehl/Kconfig b/src/mainboard/siemens/fa_ehl/variants/fa_ehl/Kconfig
index b57abc4..6f315f7 100644
--- a/src/mainboard/siemens/fa_ehl/variants/fa_ehl/Kconfig
+++ b/src/mainboard/siemens/fa_ehl/variants/fa_ehl/Kconfig
@@ -2,7 +2,6 @@
 
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
-	select DRIVERS_I2C_RV3028C7
 	select DRIVER_INTEL_I210
 	select EHL_TSN_DRIVER
 	select DRIVERS_ETH_PHY_M88E1512
diff --git a/src/mainboard/siemens/fa_ehl/variants/fa_ehl/devicetree.cb b/src/mainboard/siemens/fa_ehl/variants/fa_ehl/devicetree.cb
index bc6958d..5bc3931 100644
--- a/src/mainboard/siemens/fa_ehl/variants/fa_ehl/devicetree.cb
+++ b/src/mainboard/siemens/fa_ehl/variants/fa_ehl/devicetree.cb
@@ -143,20 +143,7 @@
 		device pci 14.0 on	end # USB3.1 xHCI
 
 		device pci 15.0 on	end # I2C0
-		device pci 15.1 on	    # I2C1
-			# Enable external RTC chip
-			chip drivers/i2c/rv3028c7
-				register "bus_speed" = "I2C_SPEED_STANDARD"
-				register "set_user_date" = "1"
-				register "user_year" = "04"
-				register "user_month" = "07"
-				register "user_day" = "01"
-				register "user_weekday" = "4"
-				register "bckup_sw_mode" = "BACKUP_SW_LEVEL"
-				register "cap_charge" = "CHARGE_OFF"
-				device i2c 0x52 on end  # RTC RV3028-C7
-			end
-		end
+		device pci 15.1 off end # I2C1
 		device pci 15.2 on	    # I2C2
 		# Add dummy I2C device to limit BUS speed to 100 kHz in OS
 			chip drivers/i2c/generic