usb: chipidea: Fix oops when removing the ci_hdrc module

The call of 'kfree(ci->hw_bank.regmap)' in ci_hdrc_remove() sometimes causes
a kernel oops when removing the ci_hdrc module.

Since there is no separate memory allocated for the ci->hw_bank.regmap array,
there is no need to free it.

Cc: v3.14+ <stable@@vger.kernel.org>
Signed-off-by: Torsten Fleischer <[e-mail]>
Signed-off-by: Peter Chen <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/chipidea/core.c

···
 	ci_role_destroy(ci);
 	ci_hdrc_enter_lpm(ci, true);
 	usb_phy_shutdown(ci->transceiver);
-	kfree(ci->hw_bank.regmap);
 
 	return 0;
 }