staging: rtl8192e: Remove unnecessary u8 and u16 casts

Hi,

This series of patches removes unnecessary explicit u8 and u16 type casts. They are broken down into 7 patches as follows:

Patch 1 removes u8 casts in assignment statements of u8 variables. Patch 2 removes u8 casts in u8 arguments to function calls. Patch 3 removes u8 casts in comparison expressions.
Patch 4 removes u16 casts in assignment statements.
Patch 5 removes the u16 cast in the u16 argument to a function call. Patch 6 removes the u16 cast because the function parameter is u32. Patch 7 removes the u16 cast from a function return statement.

Justification is found in the respective changelogs.

Cheers,
Solomon