x86/vmx: fix compilation after 997382

x86/vmx: fix compilation after 997382

997382 introduced the following errors:

intr.c:342:46: error: address of array 'vlapic->regs->data' will always evaluate to 'true'
      [-Werror,-Wpointer-bool-conversion]
                if ( vlapic && vlapic->regs->data )
                            ~~ ~~~~~~~~~~~~~~^~~~
intr.c:352:42: error: address of array 'pi_desc->pir' will always evaluate to 'true'
      [-Werror,-Wpointer-bool-conversion]
                if ( pi_desc && pi_desc->pir )
                             ~~ ~~~~~~~~~^~~
Both of those checks are done against static arrays, which doesn't seem to make
much sense, so just remove them.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>