common: bouncebuf: Permit passing custom alignment check function

common: bouncebuf: Permit passing custom alignment check function

Add extended version of the bounce_buffer_start(), which permits passing in
a custom alignment checker function for the buffer. This is useful e.g. on
systems with various DMA restrictions and where the checker function might
be more complex than a simple CPU cache alignment check.

Signed-off-by: Marek Vasut <[email protected]>
Cc: Daniel Schwierzeck <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Peng Fan <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Tom Rini <[email protected]>