amebad/fwlib/ram_hp: set access level of PSRAM kernel heap as privileged only

[abhishek-samsung]

Earlier, PSRAM kernel heap was set to be unprivileged accessible, which caused issue with memory protection. Hence, make it only privileged accessible.

[abhishek-samsung]

Earlier, data abort was not causes when accessing this address from application space, now with this commit, it causes data abort with permission error.

TASH>>hello
TASH>>print_memfault_detail: #########################################################################
print_memfault_detail: PANIC!!! Memory Management Fault at instruction : 0x0213aba6
print_memfault_detail: FAULT TYPE: DACCVIOL (Data access violation occurred. Check MPU RW permissions).
print_memfault_detail: FAULT ADDRESS: 0x02000008
print_memfault_detail: FAULT REGS: CFAULTS: 0x00000082 MMFAR: 0x02000008
print_memfault_detail: #########################################################################


up_assert: ==============================================
up_assert: Assertion failed
up_assert: ==============================================
up_assert: security level: 0
print_assert_detail: Assertion failed at file:armv8-m/up_memfault.c line: 173 task: hello
up_dumpstate: Code asserted in normal thread!
up_dumpstate: Current SP is User Thread SP: 02202930
up_dumpstate: User stack:

testcases,

[itc_pthread_pthread_kill_n_rekill] PASS

[itc_pthread_pthread_cond_init_destroy_n] PASS

[itc_pthread_setgetname_np_p_reset_name] PASS

[itc_pthread_equal_pthread_self_p] PASS

[itc_pthread_mutex_init_destroy_p_multitime] PASS

[itc_pthread_key_create_set_get_delete_specific_p_multitime] PASS

########## Kernel TC End [PASS : 415, FAIL : 0] ##########