msm: acpuclock: Select proper target frequency row for update_jiffies

Update jiffies function is called with wrong target frequency which
could result in the incorrect udelay once the frequency is changed.
Select the final target row so that the lpj is updated properly.

Change-Id: Ib52b3e77c0814e2bd3804d24cf4b77ef726c203e
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>