arm/aspeed: Drop aspeed_board_init_flashes() parameter @errp

arm/aspeed: Drop aspeed_board_init_flashes() parameter @errp

We always pass &error_abort.  Drop the parameter, use &error_abort
directly.

Cc: Cédric Le Goater <[email protected]>
Cc: Peter Maydell <[email protected]>
Cc: Andrew Jeffery <[email protected]>
Cc: Joel Stanley <[email protected]>
Cc: [email protected]
Signed-off-by: Markus Armbruster <[email protected]>
Reviewed-by: Cédric Le Goater <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Message-Id: <20200622094227.1271650[email protected]>