[WATCHDOG] hpwdt.c - fix double includes

The last clean-up created 2 times the same include. delete the doubles.
Signed-off-by: NWim Van Sebroeck <wim@iguana.be>

drivers/watchdog/hpwdt.c

@@ -39,9 +39,7 @@
 #include <linux/string.h>
 #include <linux/bootmem.h>
 #include <linux/slab.h>
-#include <linux/dmi.h>
 #include <asm/desc.h>
-#include <linux/kdebug.h>
 
 #define PCI_BIOS32_SD_VALUE		0x5F32335F	/* "_32_" */
 #define CRU_BIOS_SIGNATURE_VALUE	0x55524324