gpu: pvr: no need to check for retry failures in SGXScheduleCCBCommandKM

gpu: pvr: no need to check for retry failures in SGXScheduleCCBCommandKM

Powering on the device can't fail any more with a 'retry' error so we can't
have the corresponding condition here. See the similar commit earlier in the
patchset for a more detailed explanation.

Signed-off-by: Imre Deak <imre.deak@nokia.com>
CC: Mark Underwood <mark.underwood@imgtec.com>
CC: Mark Riding <mark.riding@imgtec.com>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@nokia.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@nokia.com>