drivers/input/touchscreen/ektf3k: auto retry 10 times on i2c
 reads The i2c devices we are connecting to may not be ready yet, or just
 busy. Retry with a 10ms pause in order to still obtain i2c data. This
 improves overall i2c data robustness

Signed-off-by: Dennis Rassmann <showp1984@gmail.com>