mmc: update to latest gingerbread_rel revision

The Samsung source is based on CodeAurora tag M76XXTSNCJNLYA6140,
which is missing several important updates to the MMC drivers
required for wifi stability.

Taken from revision: 7b8b192bb2cee24d4c932d5fc1a386e7da6ce435

Note: completely untouched (i.e. Samsung hacks removed). Separate
commit will re-add needed code to improve ar6003 compatibility.

Change-Id: Iadff5c4551507a5389803de12f0e02c356601158
Improve ar6003 wifi compatibility for MMC driver

Change-Id: Ie24560d5882990f3c160dcf843f6ee7d06bba581
Refresh configs

* MMC: update config for new MMC drivers
* MMC: add AR6003 driver workaround config (disabled for ath6kl)
* MMC: enable paranoid SD init,
* MMC: disable block bounce buffers (not needed on MSM7x27)
* KGSL: remove old config.
* Misc: update configs to reflect latest reference Android
  configs (base & recommended)

Change-Id: I883f15e2c4786804e5280e762c766d8122637c5b