mb/google/kahlee/variants/*/devicetree.cb: Reset I2C slaves

Use the new I2C slave reset function and reset all slaves connected to all
4 I2C. Do this in all boards.

BUG=b:114479395
TEST=Added debug code. Build and boot grunt. Examined output, confirmed
GPIO pins changing as required. Removed debug code.

Change-Id: Ia78ee5d5319d3c1a7daa9c56c81d435999b3a359
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/28575
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/kahlee/variants/aleena/devicetree.cb

@@ -50,6 +50,9 @@ chip soc/amd/stoneyridge
 		.fall_time_ns = 67,
 	}"
 
+	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
+				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
+
 	device cpu_cluster 0 on
 		device lapic 10 on end
 	end

src/mainboard/google/kahlee/variants/careena/devicetree.cb

@@ -55,6 +55,9 @@ chip soc/amd/stoneyridge
 		.fall_time_ns = 19,
 	}"
 
+	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
+				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
+
 	device cpu_cluster 0 on
 		device lapic 10 on end
 	end

src/mainboard/google/kahlee/variants/grunt/devicetree.cb

@@ -55,6 +55,9 @@ chip soc/amd/stoneyridge
 		.fall_time_ns = 50,
 	}"
 
+	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
+				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
+
 	device cpu_cluster 0 on
 		device lapic 10 on end
 	end

src/mainboard/google/kahlee/variants/liara/devicetree.cb

@@ -50,6 +50,9 @@ chip soc/amd/stoneyridge
 		.fall_time_ns = 8,
 	}"
 
+	register "i2c_scl_reset" = "GPIO_I2C0_SCL | GPIO_I2C1_SCL | \
+				    GPIO_I2C2_SCL | GPIO_I2C3_SCL"
+
 	device cpu_cluster 0 on
 		device lapic 10 on end
 	end