libtsm: upgrade 4.7.1 -> 4.8.0

kmscon 10.0.4 requires libtsm 4.8.0.

AI-Generated: Uses Claude Code (Claude Opus 5.5)
Signed-off-by: Markus Volk <f_l_k@t-online.de>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-graphics/libtsm/libtsm_4.8.0.bb

@@ -22,7 +22,7 @@ LIC_FILES_CHKSUM = "\
 DEPENDS = "xkeyboard-config"
 
 SRC_URI = "git://github.com/kmscon/libtsm;protocol=https;branch=main;tag=v${PV}"
-SRCREV = "ef0a1a40c30d164913f413c47de5bbd8383a6daa"
+SRCREV = "ef2365d0f9f1a370d721a82470d69c3646fe97f0"
 
 inherit meson pkgconfig