hwspinlock: sirf: Remove the redundant 'of_match_ptr'

hwspinlock: sirf: Remove the redundant 'of_match_ptr'

Remove the the redundant 'of_match_ptr' macro to fix below warning
when the CONFIG_OF is not selected.

All warnings:
drivers/hwspinlock/sirf_hwspinlock.c:87:34: warning: unused variable
'sirf_hwpinlock_ids' [-Wunused-const-variable]

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/250d35cb489c3c4c066f7ce256d27f36712a1979.1591618255.git.baolin.wang7@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>