New device: Sony Xperia M4 Aqua (sony-tulip)

Hi guys, here I am again with an another port for Sony device, this time for Xperia M4. I haven't got display to work yet, and it's hard for me to test things since my friend that tests it for me lives faaar away (my device is dead, press F to pay respect).

I documented what works and what doesn't on the wiki https://wiki.postmarketos.org/wiki/Sony_Xperia_M4_Aqua_(sony-tulip).

Should be noted that this device is a pretty nice candidate for mainline kernel since it runs 4.x kernels to some extend and its soc (8939/8936, that's a long story) is from 8916 family

Also, when making the PR I just realised I broke guidelines by merging master, but my git knowledge is not very good and I don't want to break anything

device/device-sony-tulip/deviceinfo

@@ -19,9 +19,7 @@ deviceinfo_dev_touchscreen_calibration=""
 deviceinfo_dev_keyboard=""
 
 # Bootloader related
-deviceinfo_flash_method="fastboot" 
-deviceinfo_kernel_cmdline="console=ttyHSL0,115200,n8
-msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 earlyprintk" 
+deviceinfo_flash_method="fastboot" deviceinfo_kernel_cmdline="console=ttyHSL0,115200,n8 msm_rtb.filter=0x237 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 earlyprintk" 
 deviceinfo_generate_bootimg="true" 
 deviceinfo_bootimg_qcdt="false" 
 deviceinfo_flash_offset_base="0x81dfff00"