mb/gigabyte/ga-h61m-*/devicetree.cb: Add missing IRQ

IRQ 0x70 was not declared for device 2e.7, and coreboot whined about it.

Change-Id: If40aa390722cf253169003129b31f20543fde5dd
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39739
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/gigabyte/ga-h61m-s2pv/variants/ga-h61m-ds2v/devicetree.cb

@@ -76,6 +76,7 @@ chip northbridge/intel/sandybridge
 						io 0x60  = 0x0000
 						io 0x62  = 0x0a00
 						io 0x64  = 0x0000
+						irq 0x70 = 0x00
 						irq 0x73 = 0x00
 						irq 0xc1 = 0x37
 						irq 0xcb = 0x00

src/mainboard/gigabyte/ga-h61m-s2pv/variants/ga-h61m-s2pv/devicetree.cb

@@ -89,6 +89,7 @@ chip northbridge/intel/sandybridge
 						io 0x60 = 0x0000
 						io 0x62 = 0x0a00
 						io 0x64 = 0x0000
+						irq 0x70 = 0x00
 						irq 0xcb = 0x00
 						irq 0xf1 = 0x40
 					end

src/mainboard/gigabyte/ga-h61m-s2pv/variants/ga-h61ma-d3v/devicetree.cb

@@ -80,6 +80,7 @@ chip northbridge/intel/sandybridge
 						io 0x60 = 0x0000
 						io 0x62 = 0x0a00
 						io 0x64 = 0x0000
+						irq 0x70 = 0x00
 						irq 0x73 = 0x00
 						irq 0xcb = 0x00
 						irq 0xf0 = 0x10