Fix ahci detection in kernel 2.6.35

Kernel 2.6.35 (may be, earlier) split ahci into libahci.ko and ahci.ko
and added ahci_platform.ko. As a result, drivers ahci and ahci_platform
do not contain any symbol that are checked for storage modules (it is
libahci.ko that references ata_scsi_ioctl now). So add additional
symbol ahci_init_controller; it seems this is expected to be called by
every driver based on libahci.ko.

Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru>

modules.d/90kernel-modules/installkernel

@@ -1,7 +1,7 @@
 #!/bin/bash
 if [[ -z $drivers ]]; then
     block_module_test() {
-	local blockfuncs='ata_scsi_ioctl|scsi_add_host|blk_init_queue|register_mtd_blktrans|scsi_esp_register|register_virtio_device'
+	local blockfuncs='ahci_init_controller|ata_scsi_ioctl|scsi_add_host|blk_init_queue|register_mtd_blktrans|scsi_esp_register|register_virtio_device'
 
 	egrep -q "$blockfuncs" "$1"
     }