There is no use for the .resume_clocks() callback now and in fact all
the provided functions are empty, so this patch just removes it in
preparation for further patches.
Reported-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>