oprofile, x86: Fix wrapping bug in op_x86_get_ctrl()

The "event" variable is a u16 so the shift will always wrap to zero
making the line a no-op.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org> v2.6.32..
Signed-off-by: NRobert Richter <robert.richter@amd.com>

arch/x86/oprofile/nmi_int.c

@@ -55,7 +55,7 @@ u64 op_x86_get_ctrl(struct op_x86_model_spec const *model,
 	val |= counter_config->extra;
 	event &= model->event_mask ? model->event_mask : 0xFF;
 	val |= event & 0xFF;
-	val |= (event & 0x0F00) << 24;
+	val |= (u64)(event & 0x0F00) << 24;
 
 	return val;
 }