phy: ti: tusb1210: Make tusb1210_chg_det_states static

Make tusb1210_chg_det_states static, fixing the following sparse warning:

drivers/phy/ti/phy-tusb1210.c:158:12: sparse: sparse:
symbol 'tusb1210_chg_det_states' was not declared. Should it be static?

Fixes: 48969a5623ed ("phy: ti: tusb1210: Add charger detection")
Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Hans de Goede <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/phy/ti/phy-tusb1210.c

···
 }
 
 #ifdef CONFIG_POWER_SUPPLY
-const char * const tusb1210_chg_det_states[] = {
+static const char * const tusb1210_chg_det_states[] = {
 	"CHG_DET_CONNECTING",
 	"CHG_DET_START_DET",
 	"CHG_DET_READ_DET",