UPSTREAM: arm64: entry: Explicitly pass exception level to kernel_ventry macro

We will need to treat exceptions from EL0 differently in kernel_ventry,
so rework the macro to take the exception level as an argument and
construct the branch target using that.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 5b1f7fe41909cde40decad9f0e8ee585777a0538)

[toddpoynor@google.com: fixup context, error -> error_invalid]
Change-Id: I5dfbce460f7617e33298a1ece09159572d55fb3a
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>