xtensa: remove CCOUNT_PER_JIFFY

Use ccount_freq directly to make the code a little more readable.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>

diff --cc arch/xtensa/include/asm/timex.h
Simple merge

diff --cc arch/xtensa/kernel/setup.c
Simple merge

diff --cc arch/xtensa/kernel/time.c
Simple merge