MIPS: OCTEON: fix out of bounds array access on CN68XX

The maximum number of interfaces is returned by
cvmx_helper_get_number_of_interfaces(), and the value is used to access
interface_port_count[]. When CN68XX support was added, we forgot
to increase the array size. Fix that.

Fixes: 2c8c3f0201333 ("MIPS: Octeon: Support additional interfaces on CN68XX")
Signed-off-by: Aaro Koskinen <[e-mail]>
Signed-off-by: Paul Burton <[e-mail]>
Patchwork: https://patchwork.linux-mips.org/patch/20949/
Cc: Ralf Baechle <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: [e-mail] # v4.3+

arch/mips/cavium-octeon/executive/cvmx-helper.c

···
 void (*cvmx_override_ipd_port_setup) (int ipd_port);
 
 /* Port count per interface */
-static int interface_port_count[5];
+static int interface_port_count[9];
 
 /**
  * Return the number of interfaces the chip has. Each interface