scatterlist: fix incorrect func name in kernel-doc

scatterlist: fix incorrect func name in kernel-doc

Fix a kernel-doc warning by making the kernel-doc function description
match the function name:

include/linux/scatterlist.h:323: warning: expecting prototype for sg_unmark_bus_address(). Prototype was for sg_dma_unmark_bus_address() instead

Link: https://lkml.kernel.org/r/20241130022406.537973-1-rdunlap@infradead.org
Fixes: 42399301203e ("lib/scatterlist: add flag for indicating P2PDMA segments in an SGL")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>