staging: r8188eu: merge Efuse_ReadAllMap into EFUSE_ShadowMapUpdate

Efuse_ReadAllMap is small, it's called only by EFUSE_ShadowMapUpdate.
This patch merges the two functions.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20211113185518.23941-8-martin@kaiser.cx


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