i2c: i801: Remove i801_set_block_buffer_mode

[ Upstream commit 1e1d6582f483a4dba4ea03445e6f2f05d9de5bcf ]

If FEATURE_BLOCK_BUFFER is set then bit SMBAUXCTL_E32B is supported
and there's no benefit in reading it back. Origin of this check
seems to be 14 yrs ago when people were not completely sure which
chip versions support the block buffer mode.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Tested-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Stable-dep-of: c1c9d0f6f7f1 ("i2c: i801: Fix block process call transactions")
Signed-off-by: Sasha Levin <sashal@kernel.org>