devicetrees: Remove trailing backslash from multiline values

It's not needed to put a backslash at the end of a line for quoted
multiline values. Thus, remove it.

Change-Id: I1b83d53598ba2adeed853a96d6c2c1a21f01a9f7
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78576
Reviewed-by: Erik van den Bogaert <ebogaert@eltan.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/mainboard/asrock/h110m/devicetree.cb b/src/mainboard/asrock/h110m/devicetree.cb
index 9bffafd..f676c5f 100644
--- a/src/mainboard/asrock/h110m/devicetree.cb
+++ b/src/mainboard/asrock/h110m/devicetree.cb
@@ -112,11 +112,11 @@
 			# make boards with better PCHs, which can have up to six SATA ports.
 			# However, the H110 PCH only has four SATA ports, which explains why
 			# two connectors are missing.
-			register "SataPortsEnable" = "{ \
-				[0]     = 1, \
-				[1]     = 1, \
-				[2]     = 1, \
-				[3]     = 1, \
+			register "SataPortsEnable" = "{
+				[0] = 1,
+				[1] = 1,
+				[2] = 1,
+				[3] = 1,
 			}"
 		end
 		device pci 19.0 off end # UART #2