feat(data/soc): backfill modem for Apple A6-A10 (paired iPhone baseband)

Apple SoCs pair an external cellular modem; the dataset records the modem
used in that SoC's iPhone (cf. A11=Intel PMB9948, A12=Intel XMM 7560). Filled
from teardown sources:
- A6 (iPhone 5) / A7 (5s): Qualcomm MDM9615M
- A8 (iPhone 6): Qualcomm MDM9625M
- A9 (6s): Qualcomm MDM9635M
- A10 (iPhone 7, dual-sourced): Intel XMM 7360 (matches the dataset's
  Intel-variant choice for dual-sourced years, e.g. A11)
Left null (no integrated modem, correct): Snapdragon 600/805 (APQ), Exynos 4210/4412.

Author: Seungpyo1007

data/soc/apple/2012/apple-a6.json

@@ -15,7 +15,7 @@
   "gpu_cores": 3,
   "gpu_clock_mhz": null,
   "npu_tops": null,
-  "modem": null,
+  "modem": "Qualcomm MDM9615M",
   "geekbench_single": 250,
   "geekbench_multi": 460,
   "antutu_score": null,

data/soc/apple/2013/apple-a7.json

@@ -15,7 +15,7 @@
   "gpu_cores": 4,
   "gpu_clock_mhz": null,
   "npu_tops": null,
-  "modem": null,
+  "modem": "Qualcomm MDM9615M",
   "geekbench_single": 260,
   "geekbench_multi": 470,
   "antutu_score": null,

data/soc/apple/2014/apple-a8.json

@@ -15,7 +15,7 @@
   "gpu_cores": 4,
   "gpu_clock_mhz": null,
   "npu_tops": null,
-  "modem": null,
+  "modem": "Qualcomm MDM9625M",
   "geekbench_single": 380,
   "geekbench_multi": 670,
   "antutu_score": null,

data/soc/apple/2015/apple-a9.json

@@ -15,7 +15,7 @@
   "gpu_cores": 6,
   "gpu_clock_mhz": 650,
   "npu_tops": null,
-  "modem": null,
+  "modem": "Qualcomm MDM9635M",
   "geekbench_single": 540,
   "geekbench_multi": 980,
   "antutu_score": null,

data/soc/apple/2016/apple-a10-fusion.json

@@ -15,7 +15,7 @@
   "gpu_cores": 6,
   "gpu_clock_mhz": null,
   "npu_tops": null,
-  "modem": null,
+  "modem": "Intel XMM 7360",
   "geekbench_single": 740,
   "geekbench_multi": 1320,
   "antutu_score": null,