commit 8a863a608d47fa5d9dd15cf841817f73f804cf91 upstream.

Commit 1a2f474d handles block _reads_ separately with plain-I2C
adapters, but the problem described with regmap-i2c not handling
SMBus block transfers (i.e. read and writes) correctly also exists
with writes.

As workaround, this patch adds a block write function the same way
1a2f474d adds a block read function.

Fixes: 1a2f474d ("usb: typec: tps6598x: handle block reads separately with plain-I2C adapters")
Fixes: 0a4c005b ("usb: typec: driver for TI TPS6598x USB Power Delivery controllers")
Signed-off-by: NNikolaus Voss <nikolaus.voss@loewensteinmedical.de>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>