xen/arm: alternative: Remove unused parameter for alternative_if_not_cap

The macro alternative_if_not_cap is taking two parameters. The second
parameter is never used and it is hard to see how this can be used
correctly as it is only protecting the alternative section magic.

Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Volodymyr Babchuk <volodymyr.babchuk@epam.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Release-acked-by: Juergen Gross <jgross@suse.com>

xen/include/asm-arm/alternative.h

@@ -116,13 +116,11 @@ int apply_alternatives(const struct alt_instr *start, const struct alt_instr *en
  * The code that follows this macro will be assembled and linked as
  * normal. There are no restrictions on this code.
  */
-.macro alternative_if_not cap, enable = 1
-	.if \enable
+.macro alternative_if_not cap
 	.pushsection .altinstructions, "a"
 	altinstruction_entry 661f, 663f, \cap, 662f-661f, 664f-663f
 	.popsection
 661:
-	.endif
 .endm
 
 /*