crypto: aesni - fix XTS mode on x86-32, add wrapper function for asmlinkage aesni_enc()

crypto: aesni - fix XTS mode on x86-32, add wrapper function for asmlinkage aesni_enc()

Calling convention for internal functions and 'asmlinkage' functions is
different on x86-32. Therefore do not directly cast aesni_enc as XTS tweak
function, but use wrapper function in between. Fixes crash with "XTS +
aesni_intel + x86-32" combination.

Cc: [email protected]
Reported-by: Krzysztof Kolasa <[email protected]>
Signed-off-by: Jussi Kivilinna <[email protected]>
Acked-by: David S. Miller <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>