Remove 911B variant of the SD8787 chip.

The WiBear11n mounted on my Trizeps VII is enumerated first as 911A, and later on again as 911B. This causes an unreliable SDIO interface, mainly because the HCI remains in SLEEP state after initial configuration. Another side effect is a new device hci1, corresponding to the 911B device. Removing 911B solves these issues.
Improved the SDIO interface definition for the WiBear11n module.

While the previous PAD_CTRL works, using the same PAD CTRL keeps keeps me sane.
The regulator configuration still has to be worked out, if we want to, but I rechecked the implementation in K&Ks Kernel source code, which only uses VGEN4 of the PMIC.
Since we support sdio interrupts, the device tree mirrors this now as well.