[PATCH] frv: fix build failure

[Sudip Mukherjee <sudipm.mukherjee@gmail.com>]

The frv defconfig build is failing with the error:
lib/mpi/mpih-div.o: In function `mpihelp_divrem':
mpih-div.c:(.text+0x30c): undefined reference to `abort'

The function 'abort' was never defined for the frv architecture.
Create 'abort' as is done in other arch like 'arm' and 'unicore32'.

Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
---

The build log of next-20171121 is at:
https://travis-ci.org/sudipm-mukherjee/parport/jobs/305076731

 arch/frv/kernel/traps.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/frv/kernel/traps.c b/arch/frv/kernel/traps.c
index fb08ebe..70f4387 100644
--- a/arch/frv/kernel/traps.c
+++ b/arch/frv/kernel/traps.c
@@ -633,6 +633,15 @@ void show_backtrace(struct pt_regs *frame, unsigned long sp)
 
 } /* end show_backtrace() */
 
+void abort(void)
+{
+	BUG();
+
+	/* if that doesn't kill us, halt */
+	panic("Oops failed to kill thread");
+}
+EXPORT_SYMBOL(abort);
+
 /*****************************************************************************/
 /*
  * initialise traps
-- 
1.9.1