igpu fails for a lot of formats in urMemImageCreateWithImageFormatParam.cpp

[aarongreig]

The igpu driver is returning CL_INVALID_IMAGE_FORMAT_DESCRIPTOR for certain order/data type combos. At first I suspected this was just it returning the wrong error code (it's allowed to return CL_IMAGE_FORMAT_NOT_SUPPORTED, and we have code to handle that), but a quick experiment revealed that it is returning the correct error code for a number of formats. Could still be something dodgy with the driver, but it isn't impossible we're doing something wrong - maybe these format combinations are genuinely incompatible and the igpu is the only driver that's validating for that,