genalloc.h: fix htmldocs warning

genalloc.h: fix htmldocs warning

[ Upstream commit 5393802c94e0ab1295c04c94c57bcb00222d4674 ]

WARNING: include/linux/genalloc.h:52 function parameter 'start_addr' not described in 'genpool_algo_t'

Fixes: 52fbf1134d47 ("lib/genalloc.c: fix allocation of aligned buffer from non-aligned chunk")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lkml.kernel.org/r/20251127130624.563597e3@canb.auug.org.au
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Alexey Skidanov <alexey.skidanov@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>