[quantal][PATCH] x86: efi: Turn off efi_enabled after setup on mixed fw/kernel

[Chris J Arges]

SRU Justification:

Impact: Booting i386 kernels on 64-bit efi firmware does not work on
quantal.

Fix: Upstream commit 5189c2a7c7769ee9d037d76c1a7b8550ccf3481c can be
cherry-picked into quantal. This commit is already present in raring.

Testcase: Properly boot an i386 quantal kernel on a device that has
64-bit EFI firmware.

BugLink: http://launchpad.net/bugs/1082059

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