spi.h: Rename the spi.h to spi-generic.h

Since there are and will be other files in nb/sb folders, we change
the general spi.h to a file name which is not easy to be duplicated.

Change-Id: I6548a81206caa608369be044747bde31e2b08d1a
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: zbao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/2309
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

src/southbridge/amd/agesa/hudson/spi.c

@@ -20,7 +20,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <arch/io.h>
-#include <spi.h>
+#include <spi-generic.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ops.h>

src/southbridge/amd/cimx/sb800/SBPLATFORM.h

@@ -163,7 +163,7 @@ typedef union _PCI_ADDR {
 #include "vendorcode/amd/cimx/sb800/AMDSBLIB.h"
 
 #if CONFIG_HAVE_ACPI_RESUME
-#include "spi.h"
+#include <spi-generic.h>
 #endif
 
 #define BIOSRAM_INDEX   0xcd4

src/southbridge/amd/cimx/sb800/spi.c

@@ -20,7 +20,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <arch/io.h>
-#include <spi.h>
+#include <spi-generic.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ops.h>