Laguna: Delete fixed_reg_usb2_vbus for Laguna

Laguna: Delete fixed_reg_usb2_vbus for Laguna

Delete fixed_reg_usb2_vbus;
Modify fixed_reg_usb1_vbus to fixed_reg_usb1_usb2_vbus;
Add consumer of fixed_reg_usb2_vbus into fixed_reg_usb1_usb2_vbus;
The change is to correct the configure of GPIO PPF1.

Bug 1343611

Change-Id: I5362712b035cce2c888a1a3070fd5e18559ca469
Signed-off-by: Terry Wang <terwang@nvidia.com>
Reviewed-on: http://git-master/r/258645
Reviewed-by: Hunk Lin <hulin@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>