wireless-regdb: update regulatory rules for Egypt (EG)

Update the rules to the frequency ranges and power limits
documented in [1], and update 5GHz rules to comply with
EN 301 893.

[1] https://www.tra.gov.eg/en/industry/importing-of-equipment/Pages/Regulations-for-use-of-Wireless-Networks-Devices.aspx

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
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