ssd1306: Made column differential work for SSD1306

[wyvernzora]

I changed ssd1306 driver to write page-by-page, and made column differential work without corrupting screen. This change is also preparation for sh1106 support, which I have working locally and plan to contribute in the future.

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[codecov-commenter]

Codecov Report

Merging #444 into master will decrease coverage by 0.0%. The diff coverage is n/a.

@@           Coverage Diff            @@
##           master    #444     +/-   ##
========================================
- Coverage    63.1%   63.1%   -0.0%     
========================================
  Files         125     125             
  Lines       12721   12739     +18     
========================================
+ Hits         8028    8034      +6     
- Misses       4470    4478      +8     
- Partials      223     227      +4     

Impacted Files	Coverage Δ
src/periph.io/x/periph/devices/ssd1306/ssd1306.go	95.5% <0.0%> (-4.5%)	:arrow_down:
...rc/periph.io/x/periph/host/sysfs/thermal_sensor.go	81.5% <0.0%> (-2.3%)	:arrow_down:

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[wyvernzora]

@googlebot I signed it!

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[maruel]

gohci

[maruel]

Cool thanks! It's going to be a small tad slower but I guess it's going to be fine.