Sensors: Update property name for geomag rotation vector

"ro.qti.sensors.max_geomag_rotvec" has string length is 32. The
property string length cannot exeed 31 bytes. Hence shortening the name
to "ro.qti.sensors.max_geomag_rotv"

Change-Id: I4e852de695e952fc05b6aca218edd895b38af916
diff --git a/device.mk b/device.mk
index 704fccf..e797a44 100644
--- a/device.mk
+++ b/device.mk
@@ -256,7 +256,7 @@
 
 # Set sensor streaming rate
 PRODUCT_PROPERTY_OVERRIDES += \
-    ro.qti.sensors.max_geomag_rotvec=60 \
+    ro.qti.sensors.max_geomag_rotv=60 \
     ro.qti.sensors.max_gyro_rate=200 \
     ro.qti.sensors.max_accel_rate=200 \
     ro.qti.sensors.max_grav=200 \