staging: r8188eu: merge ReadEFuseByIC into rtl8188e_ReadEFuse

The rtl8188e_ReadEFuse function is just a wrapper to call ReadEFuseByIC.
Copy ReadEFuseByIC into rtl8188e_ReadEFuse and remove ReadEFuseByIC.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220709171000.180481-9-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>