Reorder register writes according to the IPU documentation.

The registers are now set in the following order:
* the horizontal and vertical resizing enabled bits in `REG_CTRL`;
* the horizontal and vertical coefficient counts in `REG_RSZ_COEF_INDEX`;
* the source and destination image dimensions in `REG_IN_FM_GS` and `REG_OUT_GS`;
* the source and destination image stride (bytes per line) in `REG_Y_STRIDE` and `REG_OUT_STRIDE`;
* the horizontal and vertical coefficient lookup table in `REG_HRSZ_COEF_LUT` and `REG_VRSZ_COEF_LUT`.

Having the resizing enabled first allows the coefficient counts to apply properly; having the coefficient counts set first allows the coefficient configuration to apply properly.

Downscaling and upscaling are more stable with this change.