HID: amd_sfh: Add missing check for dma_alloc_coherent

HID: amd_sfh: Add missing check for dma_alloc_coherent

[ Upstream commit 53ffa6a9f83b2170c60591da1ead8791d5a42e81 ]

Add check for the return value of the dma_alloc_coherent since
it may return NULL pointer if allocation fails.

Fixes: 4b2c53d93a4b ("SFH:Transport Driver to add support of AMD Sensor Fusion Hub (SFH)")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Acked-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20221220024921.21992-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>