lm63: Fix return of temperature value

Fix a bug introduced by 7d810d5 ("lm63/i2c-comcerto: Move check of I2C
transaction time to the lm63 driver") which makes lm63 driver always
return a temperature of 0.

Google-Bug-Id: 24510687

Change-Id: I8c8a3aab51fc74ca8b7e0d31271f2c8d2b61b03f
1 file changed