powerpc/fadump: Fix compile error since trap type change

sfr reports that the allyesconfig build fails with:

  arch/powerpc/kernel/fadump.c: In function 'crash_fadump':
  arch/powerpc/kernel/fadump.c:731:28: error: 'INTERRUPT_SYSTEM_RESET' undeclared
    731 |  if (TRAP(&(fdh->regs)) == INTERRUPT_SYSTEM_RESET) {

Add an include of interrupt.h to fix it.

Fixes: 7153d4bf ("powerpc/traps: Enhance readability for trap types")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
[mpe: Reformat change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210419191425.281dc58a@canb.auug.org.au

arch/powerpc/kernel/fadump.c

@@ -31,6 +31,7 @@
 #include <asm/fadump.h>
 #include <asm/fadump-internal.h>
 #include <asm/setup.h>
+#include <asm/interrupt.h>
 
 /*
  * The CPU who acquired the lock to trigger the fadump crash should