nocturne: Fix casing for register definition

Use lower case for hex values.

BUG=b:74363445
TEST=compile

Change-Id: I24afea58b1a791fac3c87ad397a696f7f6e0d127
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://review.coreboot.org/27264
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
index 91c0b44..09b7ef9 100644
--- a/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nocturne/devicetree.cb
@@ -305,15 +305,15 @@
 				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_D9_IRQ)"
 				register "speed" = "I2C_SPEED_FAST_PLUS"
 				register "uid" = "0"
-				register "reg_prox_ctrl0" = "0x1A"
+				register "reg_prox_ctrl0" = "0x1a"
 				register "reg_prox_ctrl1" = "0x00"
 				register "reg_prox_ctrl2" = "0x84"
-				register "reg_prox_ctrl3" = "0x0E"
+				register "reg_prox_ctrl3" = "0x0e"
 				register "reg_prox_ctrl4" = "0x07"
-				register "reg_prox_ctrl5" = "0xC6"
+				register "reg_prox_ctrl5" = "0xc6"
 				register "reg_prox_ctrl6" = "0x20"
-				register "reg_prox_ctrl7" = "0x0D"
-				register "reg_prox_ctrl8" = "0x8D"
+				register "reg_prox_ctrl7" = "0x0d"
+				register "reg_prox_ctrl8" = "0x8d"
 				register "reg_prox_ctrl9" = "0x43"
 				register "reg_prox_ctrl10" = "0x11"
 				register "reg_prox_ctrl11" = "0x00"
@@ -326,8 +326,8 @@
 				register "reg_prox_ctrl18" = "0x00"
 				register "reg_prox_ctrl19" = "0x00"
 				register "reg_sar_ctrl0" = "0x50"
-				register "reg_sar_ctrl1" = "0x8A"
-				register "reg_sar_ctrl2" = "0x3C"
+				register "reg_sar_ctrl1" = "0x8a"
+				register "reg_sar_ctrl2" = "0x3c"
 				device i2c 28 on end
 			end
 		end # I2C #1
@@ -346,15 +346,15 @@
 				register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_D10_IRQ)"
 				register "speed" = "I2C_SPEED_FAST_PLUS"
 				register "uid" = "1"
-				register "reg_prox_ctrl0" = "0x1A"
+				register "reg_prox_ctrl0" = "0x1a"
 				register "reg_prox_ctrl1" = "0x00"
 				register "reg_prox_ctrl2" = "0x84"
-				register "reg_prox_ctrl3" = "0x0E"
+				register "reg_prox_ctrl3" = "0x0e"
 				register "reg_prox_ctrl4" = "0x07"
-				register "reg_prox_ctrl5" = "0xC6"
+				register "reg_prox_ctrl5" = "0xc6"
 				register "reg_prox_ctrl6" = "0x20"
-				register "reg_prox_ctrl7" = "0x0D"
-				register "reg_prox_ctrl8" = "0x8D"
+				register "reg_prox_ctrl7" = "0x0d"
+				register "reg_prox_ctrl8" = "0x8d"
 				register "reg_prox_ctrl9" = "0x43"
 				register "reg_prox_ctrl10" = "0x11"
 				register "reg_prox_ctrl11" = "0x00"
@@ -367,8 +367,8 @@
 				register "reg_prox_ctrl18" = "0x00"
 				register "reg_prox_ctrl19" = "0x00"
 				register "reg_sar_ctrl0" = "0x50"
-				register "reg_sar_ctrl1" = "0x8A"
-				register "reg_sar_ctrl2" = "0x3C"
+				register "reg_sar_ctrl1" = "0x8a"
+				register "reg_sar_ctrl2" = "0x3c"
 				device i2c 28 on end
 			end
 		end # I2C #5