Add missing bug fixes

[Jianping-Li]

This patch series adds the listed bug fixes that have been missing in QLI2.0 fastRPC driver.
following fixes:

• Add multiple fixes for remote heap which is used by Audio PD.
• Add safety checks to fastrpc_buf_free

Link: https://lore.kernel.org/all/20260407100508.1027-1-jianping.li@oss.qualcomm.com/

CRs-Fixed: 4483711

[shashim-quic]

qcom-6.18.y-checkFailing after 1s — Change Requests Validation Check

this is failing because mainline component in the CR has not been associated with valid mainline changes.

[sgaud-quic]

qcom-6.18.y-checkFailing after 1s — Change Requests Validation Check

this is failing because mainline component in the CR has not been associated with valid mainline changes.

@Jianping-Li please update CR with mainline changes

[qcomlnxci]

Test jobs on d673b20

• Job 68896 on lemans-evk
• Job 68893 on monaco-evk
• Job 68889 on qcs615-ride
• Job 68892 on qcs6490-rb3gen2
• Job 68890 on qcs8300-ride
• Job 68888 on qcs9100-ride-r3
• Job 68894 on sm8750-mtp
• Job 68895 on x1e80100-crd

[qcomlnxci]

Test Matrix

Test Case	lemans-evk	monaco-evk	qcs615-ride	qcs6490-rb3gen2	qcs8300-ride	qcs9100-ride-r3	sm8750-mtp	x1e80100-crd
0_qcom-next-ci-premerge-tests	◻️	◻️	◻️	◻️	◻️	◻️	❌ Fail	◻️
BT_FW_KMD_Service	❌ Fail	❌ Fail	❌ Fail	◻️	✅ Pass	✅ Pass	❌ Fail	◻️
BT_ON_OFF	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	⚠️ skip	◻️
BT_SCAN	✅ Pass	❌ Fail	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️
CPUFreq_Validation	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
CPU_affinity	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
DSP_AudioPD	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️
Ethernet	✅ Pass	✅ Pass	⚠️ skip	◻️	⚠️ skip	⚠️ skip	⚠️ skip	◻️
Freq_Scaling	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	❌ Fail	◻️
GIC	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
IPA	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
Interrupts	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
OpenCV	⚠️ skip	⚠️ skip	⚠️ skip	◻️	⚠️ skip	⚠️ skip	◻️	◻️
PCIe	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
Probe_Failure_Check	❌ Fail	❌ Fail	✅ Pass	◻️	❌ Fail	❌ Fail	❌ Fail	◻️
RMNET	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
UFS_Validation	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
USBHost	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	❌ Fail	◻️
WiFi_Firmware_Driver	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️
WiFi_OnOff	✅ Pass	⚠️ skip	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️
cdsp_remoteproc	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	❌ Fail	◻️
hotplug	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
irq	❌ Fail	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
kaslr	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
pinctrl	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
qcom_hwrng	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️
remoteproc	✅ Pass	❌ Fail	✅ Pass	◻️	❌ Fail	✅ Pass	❌ Fail	◻️
rngtest	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
shmbridge	✅ Pass	✅ Pass	❌ Fail	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
smmu	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️
watchdog	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	◻️	◻️
wpss_remoteproc	✅ Pass	✅ Pass	✅ Pass	◻️	✅ Pass	✅ Pass	✅ Pass	◻️