openbsc: Apply max_power_reduction changes

This version will apply the max_power_reduction when it is
changed through the control interface.
diff --git a/recipes-osmocom/openbsc/openbsc_git.bb b/recipes-osmocom/openbsc/openbsc_git.bb
index 2f99846..1bf7bb3 100644
--- a/recipes-osmocom/openbsc/openbsc_git.bb
+++ b/recipes-osmocom/openbsc/openbsc_git.bb
@@ -3,7 +3,7 @@
 PV = "0.13.0+gitr${SRCPV}"
 PR = "${INC_PR}.3"
 
-SRCREV = "a27303094ab8bedb0a3b3bfe771daeed10a2e0a9"
+SRCREV = "8a158bb1ea36d0f88da18d0f034884b30f09fda2"
 SRC_URI += "git://git.osmocom.org/openbsc.git;protocol=git"
 
 S = "${WORKDIR}/git/openbsc"