clocksource: sh_mtu2: Hardcode MTU2 clock event rating to 200
clocksource: sh_mtu2: Hardcode MTU2 clock event rating to 200

All boards use clock event ratings of 200 for the MTU2, hardcode it in
the driver.

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