drm/amd/powerplay: precedence bug in init_non_clock_fields()

BugLink: http://bugs.launchpad.net/bugs/1546572

The cast to uint8_t happens before the right shift so this always sets
.m3arb to zero.  The cast is actually a no-op so we can remove it.

Fixes: 3bace359 ('drm/amd/powerplay: add hardware manager sub-component')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 7c9574f2)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c

@@ -735,7 +735,7 @@ static int init_non_clock_fields(struct pp_hwmgr *hwmgr,
 
 	ps->memory.dllOff = (0 != tmp);
 
-	ps->memory.m3arb = (uint8_t)(le32_to_cpu(pnon_clock_info->ulCapsAndSettings) &
+	ps->memory.m3arb = (le32_to_cpu(pnon_clock_info->ulCapsAndSettings) &
 			    ATOM_PPLIB_M3ARB_MASK) >> ATOM_PPLIB_M3ARB_SHIFT;
 
 	ps->temperatures.min = PP_TEMPERATURE_UNITS_PER_CENTIGRADES *