media: venus: fix NV12 buffer sizing and incorrect capability alignment

[renjiang-qti]

The NV12 frame size calculation adds unnecessary 4K/8K padding, leading
to buffer overallocation. The redundant padding is removed while keeping
final 4K alignment. In addition, HFI platform capabilities advertise an
overly strict 16-pixel alignment for frame and blur dimensions, which
can reject valid userspace configurations. The alignment step is relaxed
to 1 without changing min/max limits.

CRs-Fixed: 4450386 4470055

[qcomlnxci]

Test jobs on 5d2fbea

• Job 67237 on lemans-evk
• Job 67238 on monaco-evk
• Job 67240 on qcs615-ride
• Job 67242 on qcs6490-rb3gen2
• Job 67239 on qcs8300-ride
• Job 67243 on qcs9100-ride-r3
• Job 67241 on sm8750-mtp

[qcomlnxci]

Test Matrix

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