kernel bump: 4.9.x-ti-rt: (4.9.74-ti-rt-r90)

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

configs/kernel.data

@@ -4,6 +4,6 @@ armv7 LTS414 4.14.12-armv7-x4
 bone-rt LTS414 4.14.12-bone-rt-r12
 ti LTS44 4.4.91-ti-r141
 ti LTS49 4.9.74-ti-r90
-ti-rt LTS49 4.9.74-ti-rt-r89
+ti-rt LTS49 4.9.74-ti-rt-r90
 ti LTS414 4.14.11-ti-r22
 ti-rt LTS414 4.14.11-ti-rt-r22