arc: Get rid of some debug prints in arc_mem

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
arc: Handle multiple size!=4 writes in arc_mem_write_block

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
arc: Reduce sleep times in arc_dbg from 1 s to 1 ms

And keep alive!

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
arc: Get rid of a lot of debug prints

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>