wifi_scan_example: Indentation Fixes
wifi_scan_example: Indentation Fixes

- Trailing white spaces removed
- Re-formatted switch-case

Basic indentation fixes were done using tools/format.sh and switch-case
formatting was done manually (to identify different levels for "switch"
and "case")

Signed-off-by: Piyush Shah <22b9c231e86e73b6822f10a284ad53e606c09e6d@espressif.com>

MIhanguangyi/esp-idf,Hermiedapwdrman/esp-idf,empoweredhomes/esp-idf,mashaoze/esp-idf,armada-ai/esp-idf,Hermiedapwdrman/esp-idf,nineisk/esp-idf,empoweredhomes/esp-idf,mashaoze/esp-idf,www220/esp-idf,www220/esp-idf,espressif/esp-idf,mashaoze/esp-idf,espressif/esp-idf,Hermiedapwdrman/esp-idf,www220/esp-idf,Hermiedapwdrman/esp-idf,armada-ai/esp-idf,nineisk/esp-idf,MIhanguangyi/esp-idf,MIhanguangyi/esp-idf,mashaoze/esp-idf,nineisk/esp-idf,espressif/esp-idf,armada-ai/esp-idf,www220/esp-idf,empoweredhomes/esp-idf,www220/esp-idf,empoweredhomes/esp-idf,MIhanguangyi/esp-idf,armada-ai/esp-idf,mashaoze/esp-idf,espressif/esp-idf,empoweredhomes/esp-idf,Hermiedapwdrman/esp-idf,MIhanguangyi/esp-idf,nineisk/esp-idf