clocksource: sh_mtu2: Turn sh_mtu2_priv fields into local variables
clocksource: sh_mtu2: Turn sh_mtu2_priv fields into local variables

The rate and periodic fields are used in a single function only, as
local variables. Remove them from the structure.

Signed-off-by: Laurent Pinchart <ae960578cc5eca7b9b1dbc37d9caa6cb634f35e0@ideasonboard.com>
Tested-by: Wolfram Sang <fd4ce474653598159cad06f3c83387a05cd53a44@sang-engineering.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs