util/liveiso/common: Install devmem2 and pcimem

devmem2 and pcimem are useful tools which allow working (reading and
writing) with memory mapped IO.

Change-Id: Ifda547b44af3c8e11cd4171a1dfbce3713455303
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66171
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/liveiso/common.nix

@@ -111,6 +111,7 @@
 		cryptsetup
 		curl
 		ddrescue
+		devmem2
 		dmidecode
 		dosfstools
 		e2fsprogs
@@ -148,6 +149,7 @@
 		p7zip
 		pacman
 		parted
+		pcimem
 		pciutils
 		phoronix-test-suite
 		powertop