ahci: add another PCI ID for marvell
ahci: add another PCI ID for marvell

1b4b:91a3 seems to be another PCI ID for marvell ahci.  Add it.
Reported and tested in the following thread.

 http://thread.gmane.org/gmane.linux.kernel/1068354

Signed-off-by: Tejun Heo <546b05909706652891a87f7bfe385ae147f61f91@kernel.org>
Reported-by: Borislav Petkov <0691a664b24b6f15b20cd5aee64b72271db08be1@alien8.de>
Reported-by: Alessandro Tagliapietra <f6d6ce6f2e5b702e74b29bc4ebe609f7b8667e4d@gmail.com>
Signed-off-by: Jeff Garzik <15f615bf7d20c2937c7eb5aa759110fd6768848c@pobox.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs