ltc2941-battery-gauge: Add support for LTC2943, whitespace and comment fixes

Fix tabs/spaces in indentation. Use kernel standard formatting for
braces. Replace C99 comments with C comments.
The LTC2943 is compatible with the LTC2941, it just adds more
registers (voltage and temperature), and uses a slightly different
conversion formula for the charge counter.
Add voltage/current/temp for ltc2943.
Simplify driver by removing unused thresholds.
Allow sense+/- polarity reversal by specifying a negative sense resistor.
topic-miami-florida.dtsi: Add proper CDCE925 clock data

Setup the I2C controlled clock on the Florida. This can be used to
drive any FPGA periferal using more accurate frequencies.