input: synaptics_i2c_rmi4: Read config ID correctly
input: synaptics_i2c_rmi4: Read config ID correctly

Config ID uses 4 bytes, not 8.  Read this value w/4 bytes
to avoid extra reads.

Change-Id: Idab21afbd8ed37e16d9e6ce80ae7641df19d04e6
Signed-off-by: Amy Maloche <136dbe9eae95bbc401d4b86e6123e55b94e20cff@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas