dma-mapping: fix false kernel-doc comment marker

Change /** to /* for the DMA attributes list comment in dma-mapping.h.
The comment is not a kernel-doc structured comment and should not use
the kernel-doc opening marker.

Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Kit Dallege <xaum.io@gmail.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20260315171001.66010-1-xaum.io@gmail.com

Author: kovan

include/linux/dma-mapping.h

@@ -9,7 +9,7 @@
 #include <linux/bug.h>
 #include <linux/cache.h>
 
-/**
+/*
  * List of possible attributes associated with a DMA mapping. The semantics
  * of each attribute should be defined in Documentation/core-api/dma-attributes.rst.
  */