tegra: hwpm: clean up code and add bug fixes

- Create tegra_hwpm_element_enable() instead of directly using
perfmon_enable() HAL. This will allow us to expand
tegra_hwpm_element_enable in future.
- Update log messages in ip structure init code and floorsweep info
function.
- It is possible that IP instances and elements to have 0 start range
address. So, modify check for available elements to use range end
instead.
- Use tegra_hwpm_fake_readl() and tegra_hwpm_fake_writel() macros
instead of fake_readl() and fake_write() functions. That way we have
similar implementation of IO functions and macros can be used across
OSes.
- Check that reserve perfmon function is invoked only for HWPM
components. This check will be useful for expansion in types of
components in the future.
- Clean up and rearrange tegra_hwpm_regops_readl_impl() and
tegra_hwpm_regops_writel_impl() to have designated code corresponding to
the element type.
- Currently, device open and release functions are incorrectly using
clock enable/disable functions instead of using HALs. Correct open and
close functions to use lock HALs.
- Currently, tegra_hwpm_update_mem_bytes() doesn't validate mem_mgmt
structure allocation before accessing mem_bytes_kernel pointer. This can
lead to kernel crash. Update tegra_hwpm_update_mem_bytes() to return
error if mem_mgmt structure s not allocated.

Jira THWPM-74

Change-Id: Ia40bd51187e5ea08572dbee81e577dacf5fb66b6
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
(cherry picked from commit 411f07484d68dfde0d350a5c67f2748e876b11b8)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-hwpm/+/2888553
Reviewed-by: Adeel Raza <araza@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

drivers/tegra/hwpm/os/linux/mem_mgmt_utils.c

@@ -366,6 +366,13 @@ int tegra_hwpm_update_mem_bytes(struct tegra_soc_hwpm *hwpm,
 
 	tegra_hwpm_fn(hwpm, " ");
 
+	if (hwpm->mem_mgmt == NULL) {
+		/* Memory buffer was not initialized */
+		tegra_hwpm_dbg(hwpm, hwpm_dbg_alloc_pma_stream,
+			"mem_mgmt struct was uninitialized in this sesion");
+		return -ENXIO;
+	}
+
 	if (!hwpm->mem_mgmt->mem_bytes_kernel) {
 		tegra_hwpm_err(hwpm,
 			"mem_bytes buffer is not mapped in the driver");