kernel/modules: location of usb-common.ko changed

usb-common.ko was moved to drivers/usb/common starting from kernel 3.16
by upstream commit f4cbd33fd5f0587910fa9db403a1b42f1cabf820

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43290 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel/modules: use crc32c_generic.ko instead of crc32c.ko

Starting from kernel version 3.15, the crc32c module was renamed to
crc32c_generic.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43291 3c298f89-4303-0410-b956-a3cf2f4a3e73