[sw] Fix a few non-absolute includes

Signed-off-by: Miguel Young de la Sota <mcyoung@google.com>

sw/device/lib/handler.c

diff --git a/sw/device/lib/handler.c b/sw/device/lib/handler.c
index ed5728c..27c867c 100644
--- a/sw/device/lib/handler.c
+++ b/sw/device/lib/handler.c
@@ -2,7 +2,7 @@
 // Licensed under the Apache License, Version 2.0, see LICENSE for details.
 // SPDX-License-Identifier: Apache-2.0
 
-#include "handler.h"
+#include "sw/device/lib/handler.h"
 
 #include "sw/device/lib/base/stdasm.h"
 #include "sw/device/lib/common.h"

sw/device/lib/hmac.c

diff --git a/sw/device/lib/hmac.c b/sw/device/lib/hmac.c
index bfad441..a823872 100644
--- a/sw/device/lib/hmac.c
+++ b/sw/device/lib/hmac.c
@@ -2,10 +2,9 @@
 // Licensed under the Apache License, Version 2.0, see LICENSE for details.
 // SPDX-License-Identifier: Apache-2.0
 
-#include "hmac.h"
+#include "sw/device/lib/hmac.h"
 
 #include "hmac_regs.h"  // Generated.
-
 #include "sw/device/lib/common.h"
 
 #define HMAC0_BASE_ADDR 0x40120000

sw/device/lib/hw_sha256.c

diff --git a/sw/device/lib/hw_sha256.c b/sw/device/lib/hw_sha256.c
index af67cae..0413857 100644
--- a/sw/device/lib/hw_sha256.c
+++ b/sw/device/lib/hw_sha256.c
@@ -4,7 +4,7 @@
 
 #include "sw/device/lib/hw_sha256.h"
 
-#include "hmac.h"
+#include "sw/device/lib/hmac.h"
 
 static const HASH_VTAB HW_SHA256_VTAB = {.init = &hw_SHA256_init,
                                          .update = &hw_SHA256_update,

sw/device/lib/usb_simpleserial.h

diff --git a/sw/device/lib/usb_simpleserial.h b/sw/device/lib/usb_simpleserial.h
index 59f4238..5929c76 100644
--- a/sw/device/lib/usb_simpleserial.h
+++ b/sw/device/lib/usb_simpleserial.h
@@ -9,7 +9,7 @@
 #include <stdint.h>
 
 #include "sw/device/lib/common.h"
-#include "usbdev.h"
+#include "sw/device/lib/usbdev.h"
 
 // This is only here because caller of _init needs it
 typedef struct usb_ss_ctx {