ARM: dts: msm: change touch DT node name to reflect correct slave address

8937 and MSMTITANIUM QRDs use Synaptics controller S332U with slave address
0x4b. Change the DT node name for Synaptics to reflect the correct slave
address.

CRs-Fixed: 982295
Change-Id: I783a74aa7d946be6b396c77e17c1b7ffbd0df9ef
Signed-off-by: Abinaya P <abinayap@codeaurora.org>