ARM: dts: msm: Fix proper i2c node for fsa4480 for sdm855

Fsa4480 child is added under i2c to communicate
with fsa switch through i2c bus. Fix to add fsa
node under correct i2c node.

Change-Id: I48271b41b3372ebcc2916f02604a08307bf30891
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>