i2c: tegra: fix maximum transfer size

BugLink: https://bugs.launchpad.net/bugs/1822271

commit f4e3f4ae upstream.

Tegra186 and prior supports maximum 4K bytes per packet transfer
including 12 bytes of packet header.

This patch fixes max write length limit to account packet header
size for transfers.

Cc: stable@vger.kernel.org # 4.4+
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

drivers/i2c/busses/i2c-tegra.c

@@ -696,7 +696,7 @@ static const struct i2c_algorithm tegra_i2c_algo = {
 /* payload size is only 12 bit */
 static struct i2c_adapter_quirks tegra_i2c_quirks = {
 	.max_read_len = 4096,
-	.max_write_len = 4096,
+	.max_write_len = 4096 - 12,
 };
 
 static const struct tegra_i2c_hw_feature tegra20_i2c_hw = {