gfx: pvr: check the size of SGX_READ_HWPERF IOCTL parameters

gfx: pvr: check the size of SGX_READ_HWPERF IOCTL parameters

We need to add a separate size check for this IOCTL's parameters, since
they are passed by a pointer in the IOCTL's input structure. We do check
the size for all IOCTL's input structure already, but we need to cover
such derefenced objects separately.

Increase the driver's minor version too. This will still let the current
user space libraries work, except for this IOCTL, which was broken
before anyway. A related user space library fix will be submitted to
make the IOCTL work.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Tested-by: Pauli Nieminen <pauli.nieminen@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>