ALSA: sis7019: fix error return code in sis_chip_create()

Fix to return a negative error code in the pci_set_dma_mask() error
handling case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Takashi Iwai <tiwai@suse.de>