modules: hal_nordic: fix errors with CMSIS_6

What is the change?
Add stubs for cmsis to avoid compile error with hal_nordic
when compiling for BSIM/POSIX.

Why do we need this change?
BSIM ci reported compiler errors when CMSIS_6 module was used for
Cortex-M instead of the older cmsis module.
The error was because CMSIS_6 couldn't find "arm_acle.h" and that
__ARM_ARCH_PROFILE was not defined to an expected value however,
this error highlighted that hal_nordic was including cmsis header
files even CONFIG_ARCH was "posix" and not "arm".

Updating to CMSIS_6 is important for future maintenance and to add new
features so we can't include those header files in hal_nordic from
CMSIS_6 but, hal_nordic still needs some cmsis alternative header file
to compile. Upon inspection it was found that there is a cmsis.h
created as an alternative when compiling for POSIX/BSIM in Zephyr so,
we use that file and fix the issue.

Signed-off-by: Sudan Landge <[email protected]>

Author: wearyzen

boards/native/nrf_bsim/common/cmsis/cmsis_instr.h

@@ -36,6 +36,22 @@
 #define __NOP()
 #endif
 
+#ifndef __I
+#ifdef __cplusplus
+  #define   __I     volatile                    /*!< Defines 'read only' permissions */
+#else
+  #define   __I     volatile const              /*!< Defines 'read only' permissions */
+#endif
+#endif
+
+#ifndef __O
+#define     __O     volatile                    /*!< Defines 'write only' permissions */
+#endif /* !__O */
+
+#ifndef __IO
+#define     __IO    volatile                    /*!< Defines 'read / write' permissions */
+#endif /* !__IO */
+
 void __WFE(void);
 void __WFI(void);
 void __SEV(void);

boards/native/nrf_bsim/common/cmsis/core_cm0.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2025 Arm Limited and/or its affiliates <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef CORE_CM0_H
+#define CORE_CM0_H
+
+#include "cmsis.h"
+
+#endif /* CORE_CM0_H */

boards/native/nrf_bsim/common/cmsis/core_cm33.h

@@ -0,0 +1,11 @@
+/*
+ * Copyright 2025 Arm Limited and/or its affiliates <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#ifndef CORE_CM4_H
+#define CORE_CM4_H
+
+#include "cmsis.h"
+
+#endif /* CORE_CM4_H */

boards/native/nrf_bsim/common/cmsis/core_cm4.h

@@ -0,0 +1,11 @@
+/*
+ * Copyright 2025 Arm Limited and/or its affiliates <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#ifndef CORE_CM33_H
+#define CORE_CM33_H
+
+#include "cmsis.h"
+
+#endif /* CORE_CM33_H */