i2c: tegra: allow VI support to be compiled out

[ Upstream commit 4f5d68c8 ]

Save a bit of code for older Tegra platforms by compiling out
VI's I2C mode support that's used only for Tegra210.

$ size i2c-tegra.o
   text    data     bss     dec     hex filename
  11381     292       8   11681    2da1 i2c-tegra.o (full)
  10193     292       8   10493    28fd i2c-tegra.o (no-dvc)
   9145     292       8    9445    24e5 i2c-tegra.o (no-vi,no-dvc)

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Stable-dep-of: 14d069d9 ("i2c: tegra: Do not mark ACPI devices as irq safe")
Signed-off-by: Sasha Levin <sashal@kernel.org>